KSEEB Class 10 SSLC History Chapter 2 The Extension of the British Rule Notes

KSEEB Solutions for SSLC Class 10 History Chapter 2 Notes Anglo Maratha Wars And Subsidiary Alliance

  • The Marathas and Mysore states were dominant in the southern and western parts of India. Therefore the hold of British was restricted to Bengal and Bombay regions only.
  • The British waged continuous wars from the mid of 18th century to mid of 19th century to extend their empire in India.
  • First Anglo-Maratha War took place from 1775 to 1782 between the Marathas and the British.
  • The Maratha federation was unable to sustain in the war and the British entered ‘ Salbai Agreement’ and ended the war. Madhav Rao II was named as the peshwa.
  • Lord Wellesley, the Governor General of India, introduced the Policy of Subsidiary Alliance in 1798 to bring Indian states under control.
  • Hyderabad was the first state to enter the subsidiary alliance, followed by Mysore, Awadh, Tanjavore,Maratha,Poona, Birar, Gwalior and other states.
  • The differences between the Maratha chieftains led to the Second Anglo-Maratha War (1803-1805). Lord Wellesley defeated the Marathas in the war.
  • Although Lord Wellesley won the Second Anglo-Maratha War, yet his battle thirstiness increased financial burden on the Company and being criticized for his policies, he was forced to resign and return to London. Due to this, peace prevailed in the region.
  • Third Anglo-Maratha War was fought between 1817 and 1818. The British suppressed various Maratha rulers cruelly and abolished the post of Peshwa, granting pension to Baji Rao II.
  • The British installed Pratapa Simha as the ruler of Satara and named him as the traditional leader of the Marathas and suppressed the Maratha resistance.

KSEEB Class 10 SSLC History Chapter 2 The Extension Of The British Rule Notes

Class 10 SSLC History Chapter 2 Notes The Consolidation of British Power (1818-1857): Anglo-Sikh Wars And The Doctrine Of Lapse

  • The British completed their plan of ruling across the entire India from 1818 to 1857.
  • A political turmoil aroused in Punjab after the death of Ranjit Singh in 1839 and the British attempted to invade Punjab by violating the Continuous Friendship Pact which they had performed with the erstwhile king.
  • In December 1845, a war took place between the British and Punjab. Hindus, Sikhs and Muslims joined hands together to confront the British.
  • They were defeated due to the treachery committed by a few leaders and were forced to sign a humiliating Lahore Agreement. With this, the British Resident became the actual ruler of Punjab.
  • As Punjab became the dependent state of East India Company, the Sikhs opposed the attempts of the British to directly rule upon Punjab.
  • This opposition was led by Chattar Singh Attariwala in Lahore and Moolraj in Multan.
  • This time again, the people of Punjab were defeated and Lord Dalhousie merged the Punjab state with the British Empire.
  • Dalhousie arrived in India as the Governor General in 1848.
  • He attempted to integrate Indian princely states with the British Empire by adopting the Doctrine of Lapse.
  • Satara, Nagpur, Sambalpur, Udaipur, Jhansi, Jaipur came under the Policy of Doctrine of Lapse.
  • Severe implementation of this policy resulted into arousal of rebellion among the common people which finally transformed into the Sepoy Mutiny of 1857.

KSEEB Class 10 SSLC History Chapter 8 Era of Gandhi and National Movement Notes

KSEEB Solutions for SSLC Class 10 History Chapter 8 Life of Gandhiji, Gandhiji’s Beginning Struggles In India, And The Achievements Of Gandhiji’s Inner Life

  • The period between 1920 and 1947 is known as the Gandian Era.
  • Mohandas Karamchand Gandhi (popularly called Bapu) was born on 2nd October, 1869 in Porbandar of present day Gujarat’s Kathiawar district.
  • Gandhiji lived in South Africa for twenty long years.
  • He opposed the Apartheid Policy which discriminated between the dark-skinned and pale-skinned people and invented a new tool of protest called ‘Satyagraha’. Gokhale was the political guru of Mahatma Gandhi.
  • He established the Sabarmati Ashram in Ahmedabad to give institutional shape to his struggles.
  • In 1917, Gandhiji launched the Champaran Movement in support of Indigo farmers.
  • In 1918, he started a movement in support of the mill workers of Ahmedabad.
  • In the same year, a protest was held in Kheda village of Gujarat to oppose land taxes.
  • He employed ‘Passive Resistance’, ‘Non-Violence’ and ‘Satyagraha’ as his major strategies in his struggles.
  • The word ‘Satyagraha’ means ‘the assertion of truth’. Gandhiji firmly believed that one should face violence with Ahimsa and Satyagraha.
  • Gandhiji said that Hindus and Muslims are two eyes of India.

KSEEB Class 10 SSLC History Chapter 8 Era of Gandhi And National Movement Notes

SSLC History Notes On Era of Gandhi and National Movement Jallianwala Bagh Massacre, Khilafat Movement, Non-Cooperation Movement

  • The British started controlling the nationalists by implementing the Rowlatt Act in 1919.
  • Gandhiji formed an association named ‘Satyagraha Sabha’ to oppose the provisions of the Act of 1919.
  • Gandhiji had called for one day hartal due to which various leaders were arrested in Punjab.
  • To protest these arrests, people peacefully gathered in Jallianwala Bagh on 13th April 1919, the Baisakhi festival day.
  • General Dyer fired at the peacefully assembled crowd there and killed almost 380 protestors.
  • This became the reason for the launch of the Non-Cooperation Movement Gandhiji.
  • The Sultans of Turkey were also the religious leaders of Turkey and were known as ‘Caliphs’.
  • During the First World War, the British harassed the Caliph and this was protested by the Muslims worldwide.
  • In India, Muhammad Ali and Shaukat Ali started the Khilafat Movement in support of Turkey in 1919.
  • Gandhiji extended support to this movement.
  • The Congress passed a resolution to conduct Non-cooperation Movement in a special national convention held in Calcutta on 4th September 1920.
  • It aimed at creating awareness among common Indians regarding the misrule of the British.
  • As an impact of the Non-Cooperation Movement, the freedom movement of India became a people’s movement.
  • On 5th February 1922, a group of almost 3000 farmers assembled in front of the police station to protest against a
  • British officer who had beaten the Congress workers when they were protesting in front of an arrack shop.
  • The police started shooting from inside the police station.
  • Agitated by this, the Indians torched the police station and all the 22 policemen were charred to death. Similar incidents occurred in other places also.
  • As a result of this, Gandhiji withdrew the Non-Cooperation Movement on 12th February, 1922.
  • This decision of Gandhiji led to a political vacuum.
  • Swaraj Party was founded by Motilal Nehru and C. R. Dass.

KSEEB Class 10 SSLC History Chapter 4 Opposition to British Rule  in Karnataka Notes

KSEEB Class 10 SSLC History Chapter 4 Opposition to British Rule  in Karnataka

Hyder Ali And The First And Second Anglo-Mysore War

  • The 18th century in Indian History is considered as “The century of political problems”.
  • Many political challenges were created in Mysore state due to the death of Chikkadevaraj Wodeyar in 1704.
  • Hyder Ali joined Mysore Army as an ordinary soldier and won the hearts of soldiers with his shrewd political moves and became famous as Nawab Hyder Ali.
  • Hyder Ali weakened the power of Dalawayee with his swift actions and sidelined King Krishnaraja Wodeyar and established the control over the administration.
  • The British saw Hyder Ali as an impedance for the expansionist ideas so they started devising cunning plans to defeat him.
  • The First Anglo – Mysore War was started in 1767 and it was fought between Hyder Ali and the alliance of the King of Arcot with the British. The First Anglo – Mysore War ended in 1769 by signing the ‘Madras  Treaty’.
  • The British went against the ‘Madras Treaty’ by capturing Mahe which  was a French colony under Hyder Ali and this became the reason for  the Second Anglo –
  •  Hyder Ali was defeated and killed in a battle held in Port Novae by the British. The Second Anglo–Mysore War ended in 1784 with the ‘Treaty of Mangalore’.

Opposition to British Rule in Karnataka KSEEB SSLC Class 10 History

Tippu Sultan And Third And Fourth Anglo Mysore War

  • Tippu Sultan became the ruler of Mysore after the death of Hyder Ali.
  • Tippu Sultan tried to drive out the British seriously as he felt that they are the major obstacle for his policy of expansion.
  • Throughout his 17 years of rule, Tippu Sultan waged war against the British.
  • Tippu Sultan tried to break the monopoly of the British over the trade with India as he knew that hurting their business interest would weaken their political strength.
  • British went against the Mangalore Treaty and helped the king of Travancore built a fort in Kochi and captured Aayakota and Kanganoor forts from the Dutch and all this led to the Third Anglo – Mysore War.
  • Lord Wellesley became the Governor General of India in 1798.
  • The Fourth Anglo: Mysore War started in 1799 and it was fought between Tippu sultan and the British.
  • The Fourth Anglo: Mysore War ended with the death of Tippu sultan.

KSEEB Class 10 SSLC History Chapter 4 Opposition To British Rule In Karnataka Notes

Dondiya Wagh

  • After the death of Tippu Sultan many rebellions took place against the British and the rebellion led by Dondiya Wagh is a major rebellion among them.
  • Dondiya was born in a Maratha family in Chennagiri. He was called Wagh (the tiger) due to his bravery.
  • Dondiya built his own Army and fought along with Tippu Sultan but he was imprisoned due to differences with Tippu.
  • After being released by British, Dondiya organized an Army with the unhappy soldiers of Tippu’s Army and the feudatory rulers who had lost their powers.
  • Dondiya captured Bidanoor and Shivamogga forts but his attempt to capture Chitradurga fort was unsuccessful.
  • Lord Wellesley organized an attack on Shivamogga, Honali, Harihara and other places under the control of Dondiya in order to check his rebellion.
  • When Dondiya left Raichur, he was caught in between the Maratha Army and Nizam’s Army. The British attacked him near Yelaparavi and killed him at Konagal.

Opposition to British Rule in Karnataka KSEEB SSLC Class 10 History

Rebellion of Kittur-Queen Chennamma and Sangoli Rayanna

  • Queen Chennamma was the queen of Kittur. She led a rebellion against the law denying the right of adopted children over the throne.
  • Shivalingarudrasarja took over reign of the Kittur after the death of Mallasarja. Shivalingarudrasarja was the elder son of Queen Chennamma.
  • Chennamma adopted a boy named Shivalingappa after the death of Shivalingarudrasarja and started ruling Kittur as a queen regent.
  • Thackeray was the collector and political agent of the British in Dharwad. He sent a report to the Governor of Bombay and attempted to take over the kingdom of Kittur under the Doctrine of Lapse Policy.
  • This led to a war between Queen Chennamma and the British. Thackeray was shot dead in this war and many British were taken as the prisoners of war.
  • Under the leadership of Colonel Deak, the British attacked Kittur again. Queen Chennamma was captured in this war and she was imprisoned at Bylahongala Fort. She passed away in the prison.
  • Sangoli Rayanna was a brave soldier in Chennamma’s Army. He fought with Rani Chennamma and was imprisoned along with her. But later he was released by the British.
  • Sangoli Rayanna developed a sense of nationalism and went on organizing an army. He aimed at looting Taluk offices and the treasury of the British.
  • The British shifted Chennamma to Kusugal prison from Bylahongala as they thought that Rayanna was being instigated by her.
  • The British cunningly captured Rayanna and declared him as an offender and he was hanged till death.

 Rebellion of Amara Sulya, Puttabasappa

  • This rebellion was basically a farmers’ rebellion which needs to be understood in the backdrops of political situations prevalent in costal Karnataka and Kodagu regions during 1835-37.
  • In 1834, the British dethroned the ruler Chikkaveerarajendra of Haleri Dynasty and transferred him to Vellor through Bangalore and later to Kashi.
  • Swami Aparampura, Kalyanaswami and Puttabasappa organized a rebellion against the political instability created by the British in Kodagu.
  • Swami Aparampura was captured in 1834 and shifted to Bangalore. Similarly Kalyanaswami was captured in 1837 and placed in Mysore prison.
  • Amara Sulya constituted Bellare, Puttur, Sulya and the major places of Canara region.
  • A farmer named Puttabasappa as Kalyanswami. The same Puttabasappa later presented himself as Swami Aparampura.
  • Puttabasappa led the rebellion and performed several acts of courage.
  • The British captured Puttabasappa and he was hanged until death along with his companions.

KSEEB SSLC Class 10 History Chapter 4 study guide Opposition to British Rule 

Rebellion of Surapura and Koppal and Rebellion of Bedas of Hulagali

  • Surapura is situated at a distance of fifty kilometers from the present day Yadgir. This was an important place since the rule of the Mughals.
  • Surapura became a vassal state during the reign of Nizam of Hyderabad and Marathas.
  • Surapura raised a rebellion against the British during the reign of Venkatappa. Venkatappa Nayaka was born in 1834 and came to throne after the death of his father Krishna Nayaka.
  • Venkatappa’s ascendance to throne was opposed by his father’s brother Peddanayaka. This resulted in internal struggles.
  • The British appointed Medes Taylor as their political agent and gained proxy power over Surapura in 1853.
  • Medes developed Surapura in a princely state and appointed Peddanayaka as the Dewan of the state.
  • The British appointed an officer named Campbell to report the various activities of the King of Surapura as it came in the notice of government that some of the representatives of Nana Saheb were present in Surapura.
  • Campbell submitted a report that the King is involved in misadministration to the resident of Hyderabad.
  • The British army captured Surapura in 1858 but there are confusions regarding Venkatappa’s death.
  • The rebellion of Koppal is an important armed rebellion against the British. The region of Koppal was ruled by the Nizam of Hyderabad.
  • Veerappa was a zamindar who rebelled against the British and occupied Koppal and other forts in the vicinity.
  • The British captured back the fort of Koppal and Veerappa died fighting the British army.
  • Hulagali is a small village of Belgaum district and it was a part of the Mudhol principality.
  • The Bedas rebelled against the British when they were asked to surrender their firearms as the British banned the usage of weapons in 1857.
  • The British army entered Hulagali in order to suppress the rebellion. All the rebels were hanged till death.

KSEEB SSLC Class 10 Biology Notes Karnataka State Syllabus

Chapter 1 Life Processes Notes

Chapter 2 Control and Coordination Notes

Chapter 3 How Do Organisms Reproduce Notes

Chapter 4 Heredity and Evolution Notes

Chapter 5 Our Environment Notes

Chapter 6 Management of Natural Resources Notes

KSEEB Class 10 SSLC History Chapter 3 The Impact of British Rule in India Notes

KSEEB Class 10 SSLC History Chapter 3 The Impact of British Rule In India Lord Cornwallis Introduced The Administration Of Civil Services

  • The East India Company granted permission for private workers to trade by which its employees made money and became corrupt. To control this, the Government of England implemented Regulating Act in India.
  • In 1800, Lord Cornwallis opened Fort William College in Calcutta for the aspirants of the Civil Services.
  • Lord Cornwallis believed that all the natives of India were completely corrupt. So, only lower grade jobs were given to the Indians.
  • After the Battle of Buxar, Mughal Emperor Shah Alam handed over the Diwani Rights to the British. With this, Dual Administration, also called Dual Governance, became effective in Bengal region.
  • Under the Dual Administration System, the authority to collect land taxes, civil and judiciary were given to the Indian officials, while the British retained the authority of managing the revenue collected.
  • By implementing new judicial system in India, the British overtook the authority of Mughals and established their supremacy in India.
  • Warren Hastings who became the Governor in 1772 advised that a Dewani Adalat as a civil court and a Faujdari Adalat as a criminal court needed to be established in each district.
  • Civil courts were under the control of European officers and the criminal courts were under the control of the Qajis, who functioned under the supervision of European officers.
  • Lord Cornwallis implemented the Police System in India and created the post of Superintendent Police (SP). He divided every district into many ‘Stations’ and each station was put under a Kotwal. Every village was put under a Chowkidar.
  • The Police Law was implemented in 1861.
  • The British appointed the Indians for the military and an Indian could reach the rank of Subedar.
  • The Military system was redesigned on the recommendations of Peel in 1857.

KSEEB Class 10 SSLC History Chapter 3 The Impact Of British Rule In India Notes

KSEEB Class 10 SSLC History Chapter 3 The Impact of British Rule in India

Land Tax Policies- Permanent Zamindar System, Mahalwari System, Ryotwari System

  • The East India Company had to pay four lakh Pounds to the British Government for its control upon the Bengal province. To fulfill this commitment, the Company had to strengthen its financial position in a secure way.
  • Therefore, it implemented various new land policies.
  • Lord Cornwallis implemented a new land tax policy called the Permanent Zamindari System in Bengal and Bihar regions during 1793 to generate steady revenue for the company every year.
  • R. M. Bird and James Thomson implemented the Mahalwari System (Mahal means ‘taluk), under which the Company entered into an agreement at the level of ‘Mahals’ in context to payment of land tax in Uttar Pradesh, in many parts of Madhya Pradesh, Punjab and Delhi.
  • In 1792, Alexander Reed implemented the Ryotwari System, firstly in Baramahal region.
  • The Ryotwari System was later implemented in Madras and Mysore region by Thomas Monroe in 1801.
  • Impact of British Land Tax System:
  • A new class of Zamindars was created and it exploited the farmers.
  • The farmers became landless gradually due to this exploitation.
  • Land became a commodity and loans could be raised against its mortgage.
  • Many zamindars were also forced to mortgage their land to pay land taxes.
  • The agricultural sector became commercialized and crops were grown to fulfill the requirement of raw materialsneeded by the industries situated in England.
  • The money lenders attained a strong position

KSEEB Class 10 History Chapter 3 The Impact of British Rule in India notes

The Modern Education System: Lord Macaulay,Wood’s Commission (1854)

  • New changes took place in the Indian educational system during the British rule in the 18th century.
    Warren Hastings facilitated the expansion of modern education in India. But it was Charles Grant who emphasized for the universalization of British education in India.
    After William Benedict was appointed the Governor General of India, British education in India expanded significantly.
    Macaulay was appointed as the member of Governor General’s Executive Committee and also as the Chairperson of the Committee on Education.
    The report on education submitted by him became the basis of the modern education in India.
    Governor General Lord Dalhousie established universities in various Indian cities on the recommendation of Charles Wood’s Commission.

         Impact of British Education in India:

  • The Indians were able to develop modernity, secularism, democratic attitudes and rationality.
  • Local literature and languages received impetus.
  • Periodicals were available now. These checked the policies of the government and helped the Indians develop a critical attitude.
  • New social and religious reform movements started.
  • The thoughts of scholars such as Rousseau and Montesquieu brought renewed thinking among the Indian educated youth.
  • The freedom struggles taking place across the world influenced the Indians also.
  • Indians were able to understand and appreciate their rich and glorious tradition.

Impact of British Rule in India explained in KSEEB Class 10 History

Laws during British Rule- Regulating Law, Pitt’s India Law, Charter Laws

  • The British made efforts to create and implement different rules in the form of laws.
  • Corruption emerged after the implementation of Dewani Rights in 1765.
  • Edmond Burk, a member of the British Parliament, termed the tax payment received by the British Government from the East India Company as ‘Criminal Tax’. The Regulating Act was implemented in such circumstances in 1773.
  • Pitt’s India Act was implemented to rectify several inconsistencies in the Regulating Act of 1773 and to clearly outline the powers of the East India Company and the British Government.
  • The Board of Controllers which was constituted had the powers to direct and control the issues associated with land taxes, military and civil areas.
  • Major objective of the Charter Acts was to renew the license of the East India Company.
  • The Charter Act of 1813 licensed the East India Company to stay for further twenty years in India.
  • The Charter Act of 1833 aimed at improving the Indian situation and this act also licensed the East India Company to remain in India to another twenty years.
  • The Sepoy Mutiny took place in 1857 due to maladministration of the East India Company and anti-Indian acts.
  • As a result, the administration of India fell into the hands of the British crown. During this period, various Indian Government Acts were implemented.
  • The Indian Government Act of 1858 brought India under the direct administration of the Queen.
  • Along with the implementation of Indian Councils Act of 1861, the Indians were allowed to participate in the process of creating laws.
  • Indian Councils Act of 1892 further extended the participation of Indians in the legislative bodies.
  • Indian Councils Act of 1909, also known as ‘Minto-Morley Reformation Act’, was used to divide and rule India.
  • Indian Councils Act of 1919, also known as ‘Montague-Chelmsford Reformative Act’, was formulated by accepting the report of Lord Chelmsford and Lord Montague.
  • Indian Government Act of 1935 acted as a base for the formation of the Indian Constitution.
  • Though, the acts formed by the British served the purpose of their interest, yet they also included the aspirations of the Indians for self-governance.

KSEEB SSLC Class 10 Biology Notes Karnataka State Syllabus

Chapter 1 Life Processes Notes

Chapter 2 Control and Coordination Notes

Chapter 3 How Do Organisms Reproduce Notes

Chapter 4 Heredity and Evolution Notes

Chapter 5 Our Environment Notes

Chapter 6 Management of Natural Resources Notes

KSEEB Class 10 SSLC History Chapter 10 The Political Developments of 20th Century Notes

SSLC Class 10 History Chapter 10 Notes First World War, Russian Revolution, the Rise of Dictators

  • Prior to 1914, the powerful countries of Europe- England, Germany,
  • France, Italy, the Austro-Hungarian Empire and Russia were in continuous war in context to establishing control upon colonies.
  • These issues were upsetting the power balance between the European countries. As a result of all this, various alliances of different countries were formed.
  • The First World War divided the countries into 2 groups- A Triple Entente of England, France and Russia, and a Triple Alliance of Germany, Italy and Austria-Hungary. Later, Italy
    joined the opposite camp.
  • The immediate cause of the First World War which took place between 1914 and 1918 was the assassination of Archduke Francis Ferdinand, the Prince of Austria.
  • Germany had to face defeat in this war.
  • The Triple Entente forced Germany to sign the insulting Treaty of Versailles in 1919.
  • The League of Nations came into existence in 1919 to avoid any future war.
  • USA remained neutral in the beginning of the war, but it joined the group of England and France, which changed the entire scenario.
  • The Russian Revolution took place in November 1917, and along with this, it entered into an alliance with Germany and withdrew from the war.
  • Russia was ruled by the Tsars in the 19th century. People were fed up with the administration of the Tsars.
  • When Japan defeated Russia in 1905, this made the people agitate more and they resisted against the Tsars.
  • Vladimir Ilich Lenin guided the revolution of the farmers and the workers and when this revolt became intense, Tsar Nicholas II was forced to flee from the country.
  • This is known as the February 1917 Revolution.
  • The power was shared by the ‘Menshiviks’ (the moderates) and they declared Russia as a republic.
  • Lenin returned to Russia at this time and was supported by the workers and farmers.
  • The Bolsheviks (the party of the workers) created the October Revolution in 1917.
  • Lenin joined the party and declared Russia as a Socialist Republic Union on 7th October. This is known as the October Revolution.
  • Lenin became the President of the government.
  • Lenin was the first to implement Karl Marx’s scientific communism in practice. He died in 1924.
  • Joseph Stalin became the President after the death of Lenin and he made USSR as a hardcore opponent of USA.
  • After the Second World War, USSR took the leadership of Communist countries.
  • Joseph Stalin was opposed for his policies and various reformations such as ‘Glasnost’ in 1985 and ‘Perestroika’ in 1987 were introduced.
  • Gorbachev, the then President of USSR, implemented these reforms and communism collapsed there and USSR was disintegrated.
  • The situations which emerged after the end of the First World War brought Hitler into power in Germany and Mussolini into power in Italy.
  • Hitler became the Chancellor of Germany, and after the death of President Hindenburg, he became the dictator.
  • Hitler declared the Nazi Party as the only party of Germany.
  • He forwarded the supremacy of German race theory and said that the Jews, Communists, Socialists and Catholics are unfit to remain alive. This was the theory of Nazism.
  • Hitler implemented mass killings of people, which is known as Holocaust.
  • In 1935, Hitler implemented Nuremberg Laws and imprisoned the Jews in Concentration Camps where they were starved to death.
  • This action of Hitler resulted into the Second World War.
  • The impact of the First World War and emergence of social movements in Europe resulted into the growth of the Fascist Party of Mussolini in Italy.
  • Mussolini remained the Prime Minister of Italy from 1922 to 1943 and he founded the National Fascist Party.
  • In 1925, he legally dismissed the democracy of Italy and became the dictator. He established one part dictatorship.
  • He joined Hitler to cause the Second World War and was responsible for the death of thousands of people. He was assassinated in 1945.

KSEEB Class 10 SSLC History Chapter 10 The Political Developments of 20th Century Notes

SSLC Class 10 History Chapter 10 Second World War, Chinese Revolution, Cold War, And The Rise Of America

  • The Second World War started with Germany’s occupation of Poland on 1st September 1939.
  • This was took place between 1939 and 1945.
  • As the rich countries spent immense money in this war, it resulted into the Great Economic Depression during the 1930s.
  • Axis and Allies were the two groups that emerged during the Second World War.
  • Italy, Japan and Germany were part of Axis, while England, France, Russia and other countries were part of Allies.
  • Russia entered into a Non-War Pact with Germany on 24th August 1939.
  • In 1941, Hitler turned his attention towards Russia which forced Russia to re-enter the war.
  • USA dropped the first atomic bomb of the world on Hiroshima and Nagasaki of Japan.
  • Japan surrendered on 15th August 1945 and with this the Allies emerged victorious in the war.
  • After the Second World War, the United Nations Organization was formed and it replaced the League of Nations.
  • Nuclear arm race now started between the powerful countries.
  • China is one of the ancient countries of the world with a rich history.
  • An anti-imperialistic democratic revolution took place under the leadership of Sun-Yat-Sen in China in 1911.
  • The Communist Party was formed in China in 1925.
  • During the Second World War, Japan attacked China and Japan accepted its defeat in 1945.
  • People’s Republic of China was formed on 1st October 1949.
  • After the Chinese Revolution, Leap Forward programme was introduced and in order to rectify several mistakes in its implementation, Deng Xiaoping introduced many reforms in 1979.
  • China has now adopted the Principles of Capitalism along with the framework of communism and is rapidly becoming a major economic force.
  • Cold War refers to the mistrust which emerged between the two factions of the Second World War. It is a war between the Capitalist Block led by the USA and the Communist Block led by the USSR.
  • Military organizations such as NATO, SEATO and CENTO were formed under the leadership of USA.
  • Military organization named Warsaw was formed by the USSR.
  • Many crises emerged due to the Cold War.
  • The Cold War which continued on equal basis leaned in favour of USA after 1985.
  • The Great Economic Depression that influenced USA in 1927 resulted into various changes in the politics of USA.
  • Today, USA is the only superpower of the world.

KSEEB Solutions For SSLC English Class 10 Prose Chapter 8 Science And Hope Of Survival

KSEEB Solutions for SSLC Class 10 English Chapter 8 Science And Hope Of Survival Points To Ponder

The lesson is an article that discusses the necessity and importance of science and scientific research.

The author, being a scientist discusses the need for practical and basic science in different aspects. In 1960, during the height of the Cold War, the author was in Moscow doing research on the theory of seismic waves, he was summoned by the President of Russia to attend a summit in Geneva.

At that time the Earth lived under the threat of annihilation by a nuclear weapon as the three superpowers USSR, USA, and UK possessed them.
Hence they maintained peace because of the fear of Mutually Assured Destruction (MAD).

Scientists all over the world gave a unanimous solution which resulted in the Nuclear Test Ban.

Scientific inventions like antibiotics, electronics, biotechnology, synthetic fibers, the green revolution, and genetic forensic diagnosis, etc. have given hope for the welfare of the world.

It is commonly recognized that the very survival of our civilization is threatened by natural and man-made disasters. Among them are earthquakes, self-inflicted destruction of megacities, environmental catastrophes, and economic and social crises.

KSEEB Solutions For SSLC English Class 10 Prose Chapter 8 Science And Hope Of Survival

Science And Hope Of Survival SSLC English Textual Exercises Check Your Understanding

A. 1..a)‘If you are so clever, why are you so poor?’

The professional addressed as ‘you’ in the statement above refers more than others to a (fill in the blank choosing the best form in the alternatives below)
1) scientist
2) lawyer
3) doctor
4) businessman
Answer: 1) scientist

b. Justify your choice in the above question.
Scientists are the professionals who work day and night in their field so as to make inventions and discoveries but they are paid less in comparison to the amount of pain and strain they would have put on. The true reward for their work is their discovery or invention which earns them a lot of appreciation for their contribution to the world.

Read paragraph
(1) and
(2) carefully, all fill in the blanks in the columns below

prose table 1

Answer :

prose table 3

3. A few words are given below. Some of them are related to the field of business, and some are to the field of science. Maybe a couple of them are related to both.

Read, discuss and fill them in columns A, B and C accordingly

prose table 2

Answer:
prose table 4

4. The writer says. “I found myself in Geneva.” It expresses, more than anything else, the writers.

(choose the right option and fill in the blank)

1) pleasure
2) surprise
3) anxiety
4) annoyance
[ choose the correct word and fill in the blank]
Answer: 2) surprise

5. Afew statements are made below. Read them and say which of them is true or false according to the text. tick Yes/No, accordingly

1) The war was going on between the US and the USSR when the Geneva meeting was called. Yes/No
Answer: No

2) Everyone lived under the fear of annihilation by nuclear weapons. Yes/No :
Answer: Yes

3) In the nuclear war, the first who strikes will be the survivor. Yes/No
Answer: No

4) The three superpowers were willing to put a ban on nuclear weapon tests. Yes/No
Answer: Yes

6. Earth tremors are. caused by two factors. One is the earthquake. What is the other factors?
Answer: The other factor may be the underground nuclear explosions.

7. Which of the following qualities helped the scientists to come up with a solution to the problem? Which of them did not?
Put the right( ) or( ) wrong in the boxes accordingly

self-assessment [R]
self-praise [W]
popularity [W]
experience [R]
self—discipline [R]
respect of evidence [R]

8. What was the important decision that the politicians took before Geneva Summit?
Answer: The important decision that the politicians took before Geneva Summit was to bring out the ‘Nuclear Test Ban’.

9. “Immersion in science does not go with common sense.” Suggests-
1) Foolishness of scientists
2) Absentmindedness of scientists
3) scientists do not bother about the results of Their work
(Complete the sentence with the right choice)
Answer: 2) Absentmindedness of scientists

10. With whose help can the world be ready with preparedness to face the challenges that natural calamities pose?

Answer: The world can face the challenges caused by natural calamities only with the help of scientists. The basic research of the scientists can create a springboard for developing new disaster preparedness.

11. Write at least the names of three subjects that come under the category of basic science.
Answer: physics, chemistry, biology.

12. Who can best ensure our safety in the world?
Answer: The scientists with their research work with the support of well-organised political systems and well-informed citizens with humility can ensure our safety in the world.

Analysis Of Science And Hope Of Survival Think About The Text

1. Which sentence in the text suggests the author was involved more in the theoretical research than in its application to the warcraft?
Answer: The following lines suggest that the author was involved more in the theoretical research than in its application to the warcraft—“‘I was in Moscow doing research on the theory of seismic waver — tremors generated by an earthquake. I‘ was absorbed in my problem; I enjoyed the mathematical challenge. I did not give much thought to how it connects with real life.”

2. “A paradox may refer to a person, a thing or a situation that has two opposite features and therefore seems strange.” In light of this definition, how is ‘MAD’ a paradox?
Answer: During the Cold War period every human who lived on the earth was under the threat of annihilation by a nuclear weapons. Each Super Power had manufactured deadly nuclear bombs and missiles to destroy the others. This ‘Mutually Assured Destruction (MAD)’ was like the only thin thread protecting all of us from the common fatal fate. Thus the nuclear weapons which were the reason for destruction were also the reason for non-destruction. Thus the “MAD” is certainly a paradox.

3. What was the ‘problem’ that nuclear power had faced? Was it a violation of the agreement or was it the detection of violation? Explain briefly.
Answer: The problem was the detection of violation. Suppose that —the nuclear powers had signed agreement to stop the test of the new nuclear weapons, and if one ofthe participants had violated this agreement and secretly made an underground nuclear explosion, then how the other powers can detect the violation.

4. “Iron curtain” is referred to as a barrier. It was outwardly difficult for the opposite sides of the iron curtain to find out the solution for the problem of violation of the agreement. What was the reason?
Answer: It was outwardly difficult for the opposite sides of the Iron Curtain to find out the solution for the problem of violation of agreement because of the vast differences in their cultural background. While one side was capitalist the other was communist. There was a great contrast in the ideologies themselves.

5. Make a list oflessons that the writer learnt at the Geneva Summit.
Answer: The writer learnt at the Geneva Summit that all the scientists all over the world think and interact in a similar manner. It taught him never to feel lonely whenever he went abroad. The most important lesson it taught him was while there is science, there is the hope of survival and well-being for all the humankind.

6. Give a few examples which illustrate the writer’s stand that scientists are the most practical people in the world?
Answer: The writers say that scientists are the most practical people in the world. The inventions of new technologies, new brands of industry right from defense to entertainment like antibiotics, electronics, biotechnologies etc. are examples of research has given us new sources of energy, cure from cancer, efficient defense from terrorism etc. These people are headhunted by various organizations and given top posts.

7. Who willbe headhunted by financial institutions and pharmaceutical industries? Why?
Answer: People trained in theoretical physics are headhunted by financial institutions. Those trained in the frontiers of biological research become founders and directors in the Pharmaceutical industry. This is due to the feet that theyare highly knowledgeable in basic science which gives them a head start in their career.

8. Some statements are given below. Why or why not are they true? Discuss with your partner.
a) Money is more powerful than intellectual resources.
Answer: a)Money can never be more powerful than intellectual resources. Money can buy any physical or material resources but it cannot buy intelligence. Without intelligence we can earn money but money cannot buy intelligence.

b) Intellectual resources help the survival of mankind
Answer: Intellectual resources help the survival of mankind: Yes, It is the intellectual resource that is helping the survival of mankind and it is the intellectual resource that is responsible for destruction too. The intellectual power used for the welfare of mankind can make this world safe and beautiful to live in. The invention and discovery of antibiotics, medicines for deadly diseases, advancement in transport and communication, etc. are some of examples the positive use of intellectual resources. The manufacture of deadly weapons is an example for the misuse of intellectual resources.

c) Basic research is a way of stalling disasters
Answer: Basic research is a way of stalling diseases: Research on various fields yields both helpful as well as harmful results. Basic research can create a springboard for developing a new disaster preparedness industry. Research can help predict the threat of natural disasters and manmade disasters. It can help in finding cure for fatal diseases like cancer etc. The main purpose of conducting research in any field is for the welfare of humankind.

Class 10 SSLC English Science And Hope Of Survival Enrich Your Vocabulary

Task -1: Take a look at the underlined words in the given paragraph, The word ‘train’ collocates ( combines naturally) with ‘fast’ and not with ‘brisk’.

I boarded the fast train to Delhi along with my partner and sister last evening. After reaching Delhi we checked into a hotel that was booked earlier. I had a quick glance at the menu and placed orders for some snacks. Next morning, my father and I took a brisk walk in the garden outside the hotel and looked for birds in the tree. But we were disappointed as there had been a rapid decline in the number of birds

Task 2: I Following the example given above, fill in the blanks with correct collocations (appropriate combination of words) choosing from those given

The Government sanctioned a few crores of rupees to build the stadium in our town. The builders made (1) rapid progress with the stadium. While the work was in progress, unfortunately, a boulder rolled down on a worker and he was injured. Immediately, he was rushed to a nearby hospital, I wished him (2) a speedy recovery The Government took (3) swift action against the builders. The builders made(4)a prompt payment. (a speedy recovery, a prompt payment, swift action, rapid progress)

Answers: Enrich your vocabulary.

Task 3: I Champaka is n in Goa. She writes a letter to her friend, Suma. She consciously uses collocations leaving options for Suma to choose right collocations. How would Suma use them?

Hi Suma Weather’s fantastic here. We make/walk-take a stroll along the beach every morning. MY grandpa made/got/accepted friends with some foreigners here yesterday. He changed/exchanged/ passed some interesting ideas to them. I happened to read on article on climate change in one of the local news papers. It was excellent and said that rising / rising/going/ sea levels are the menacing/ disturbing/ changing factors for the ecological balance. They are causing irreparable/ inseparable/_acute damage to the environment. I
will be back in Bengaluru next week and we can discuss more about these things. Take care.

Bye,
Champaka

Answers: Task 3: take, made, exchanged, rising, disturbing, irreparable.

Task 4: |Match the words in the box on the left with words that they collocate with on the right. Note some words shown in they box A may collocate with more than one word in box B. After matching, frame the appropriate sentence. You may follow the given example.

prose table 5

1. Sunder’s joke drew hilarious laughter from the audience.

2. Amit raised certain doubts about the decisions of the meeting.

Answer: Task 4: make money, make gestures, lay emphasis, draw parallels, combat violence, raise doubts, and commit crime.

Mr. Ramesh has made money after changing his profession.

My father lays emphasis on continuing his business as my profession.

Bangalore can draw a parallel with Delhi in terms of pollution.

A parent made a generous gesture by donating computers to our school.

No law and order can combat violence without the support of a good citizenry.

We should never commit a crime.

Science and Hope of Survival for Class 10 SSLC Practice Writing

Task 1 You are asked by your teacher to contribute an article to your school magazine on : Space Exploration. Your teacher edits and rewrite it. Observe how your teacher has done it for you.

an American has Space exploration is a big part of American history. It is been in is as shrouded te controversy for years. Space exploration is defined. ….. artificial and their moons through the use of artificial satellites- space probes and inspire space crafts with human crews. Space exploration inspires and enlightens who it enlightens every person which comes in contact with its. One example an of an inspiring event in space exploration was the Apollo project. They were successful Apollo missions is rarely disastrous but often see full and triumphant.

Answers: Practice writing.

[Task 2]  Edit and rewrite the following article written by your friend for the school magazine on “Rockets.”

Rockets carry satellites and people into space. a rocket burn fuel and produces a jet of gas. The hot gas expands and is blasted downwards causing a force to push the rocket up. The first liquid-fuelled rocket is launched in 1926. it reached 12.5 M.. The flight lasted 2.5 seconds. There are many kind of rockets. Today rockets such as Arianne Sis are used to send satellites, Its size determines whether it is sent up by a small or large rocket.

Note: Your editing includes
a) correction b) deletions c) additions d) substitutions wherever necessary

Answers: Task 2: Rockets carry satellites and people into space. The rocket burn fuel to produce a jet of gas. The hot gas expands and is blasted downwards causing force to push the rocket up.

The first liquid-fuelled rocket was launched in 1926 and it reached 12.5 miles high. The flight lasted 2.5 seconds. There are many kind of rockets. Today rocket such Arianne Sare are used to send satellites. It’s size determines whether it is sent up by a small or large rocket.

SSLC Class 10 English Chapter 8  Learn grammar Through Communication Reporting

[Task 1]: Read the conversation between Ram and Shashi. A friend of Ram and Shashi writes their conversation in a paragraph.

Observe how he has done it;

Ram: Hi, Shashi, please come in
Shashi: Thanks.
Ram: Would you mind taking off your shoes?
Shashi:  Sorry, I forget
Ram: We always take off ours shoes before we enter the house.

Ram was pleased to see Shashi and welcomed her. Shashithanked him. Ram asked her politely if she could take shoes. Shashiregretted for not having remembered it. Ram told her about their practices at home.

TASK 2 Read the conversation two business partners and complete the passage by choosing appropriate word/words given below.

Jane: Good morning, Robert.
Robert: Very good morning, Jane
Jane: Let’s not waste our time. Small we begin?
Robert: Sure. I’m rather glad you raised the
subject.
Jane and Robert exchanged pleasantries. Jane was eager to get into the business. She asked Robert accept and that glad as she the subject. (told, had raised, if they should begin their talks,he was)
Answer: Learn grammar through communication

Task 2: Jane and Robert exchanged pleasantries. Jane was eager to get into the business. She asked him if they should begin their talks. Robert accepted and told her that he was glad as she had raised the subject.

Read what happened ina the camera shop between the owner, Henry and the  customer,Arathi. Complete the paragraph that follows using the given choice appropriately.

Henry: Here’s a nice camera.
Arathi: oh, it’s beautiful!
Henry: That’s a little expensive
Arathi: How much is it?
Henry: It’s 175 dollars.
Arathi: I think this one will be fine.

Henry showed Arathia nice camera. It was beautiful. Henry the camera was a bit costly. Later, she about its price to which he. 175 dollars. Finally, Arathi decided to buy it.

a) remarked that
b) wanted to know
c. replied that itwas
d. admired it saying that

Answer: Task 3: Henry showed Arathi a nice camera. She admired it saying that it was beautiful. Henry remarked that the camera was a bit costly. Later, she wanted to know about its price to which he replied that it was 175 dollars. Finally, Arathi decided to buy it.

Task 4 Read the conversation between two old school friend and write it in a paragraph in the reported form.

Chandan: I met Rani last week in Mysore.

Raghu: Oh. Does she look the same?
Chandan: There’sa a little bit of change in her appearance. But, she remains the same.
Raghu: What’s she doing now?
Chandan: She work for private company.

Begin with
Chandan told Raghu

Answer: Task 4: Chandan told Raghu that he had met Rani the previous week in Mysore. Raghu asked Chandan if she looked the same. Chandan replied that there was a little bit of change in her appearance. But, she remains the same. Raghu wanted to know what she was doing then and Chandan remarked that she worked for a private company.

Interesting language activity: for formative assessment vocabulary and grammar
i. Down and across.

From the clues given, fill the square box with four different word squares that will read the same

down as across.
Clues A Clues B
— useless material —animal’s nose
— eager longing —earth’s Pole
—talks wildly — speak publicly
— prevent, avoid — say, total

— destructive, insects —not here

prose table 6

 

prose table 8

Acronyms.

Anacronym is a word formed with the first letters of the words in the phrase.

Examples – UNO, UNESCO, AIDS, RADAR, etc.

KSEEB Solutions For Science And Hope Of Survival  Expand The Following Acronyms

1.RAM – Random Access Memory.
2. ROM – Read-only Memory.
3. LAN – Local Area Network.
4. AIR – All India Radio.
5. NGO – Non-Government Organization.
6. NEWS- North East West South.
7. CAT – Common Admission Test.

Text box A contains phrases and Text box B contains its meanings. Match them and write them together in the space provided below:

prose table 7
Answer:
1) bargained for – expected
2) got over—recovered
3)looked into — investigated
4) did up — tied
5) launched into — began
6) stands for — symbolizes
7) come between
8) laid on — provided
9) played down – minimized

B. Now complete the sentences using the phrases from box A.

1) She hadn’t bargained for him.
2) She got over her illness.
3) The police looked into it.
4) She did up her laces.
5) He launched into a long speech.
6) The logo stands for the company.
7) This mustn’t come between us.
8) They laid on a good meal.
9) He played down its importance.
10) She pulled his argument apart.

Class 10 SSLC English Chapter 8 Science And Hope Of Survival Interesting Activities Of Comprehension And Composition

Get into pairs, read the lesson carefully, and choose the correct option to complete the sentences.

1) According to Kellis Borok, science is an exciting adventure where a major reward comes from the
1) Discovery itself
2) The honors and promotions
3) Money earned from the discovery earned for the scientific invention
4) Awards
Answer: 1) Discovery itself

2. In 1960, the author, KellisBorok was in Moscow

1) To attend a Summit called by the President of Russia
2) Doing research on the theory of seismic waves
3) To do research in theoretical physics
4) To present his research analysis in the Summit called by the President of Russia.

Answer: 2) Doing research on the theory of seismic waves

3. The one-word meaning of ‘scientific method of finding out about a crime’ is
1) Diagnosis
2) Genetic
3) Legal
4 Forensic
Answer: 4) Forensic

4. According to the author, the most practical people in the world are
1) Teachers
2) Researchers
3) Scientists
4) Politicians
Answer: 3) Scientists

5. The word in which ‘in’ is a prefix but not a part of the word is
1) Insecure
2) Injured
3) Intellect
4) Involved
Answer: 4) Insecure

KSEEB Solutions Class 10 Chapter 8 English Science And Hope Of Survival Read the Extracts Carefully And Answer The Questions

1. ‘I was absorbed in my problem’.
a) Who is the ‘I’?
Answer: ‘T refers to Keillis Borok.

b) What is the ‘problem’ referred to here?
Answer: The problem refers to the research work on the theory of seismic waves.

c) Where was the speaker attending to his problem?
Answer: The author was doing his research work in Moscow.

2. ‘We were working out a solution that eventually allowed politicians to reach one of the most important decision.”

a) Who were the ‘we’?
Answer:‘We’ refers to the scientists of the world.

b) On what solution were they working on?
Answer: The scientists were working on finding out a solution to reduce the tension of the cold war through disarmament ways.

c) What was that one of the most important decisions taken by the politicians?
Answer: The politicians reached one of the most important decisions, S ‘Nuclear Test Ban’ to save the earth from destruction.

Rearrange the following words and phrases to form meaningful sentences. One example has been done for you.

After 1960 / Indian cities / expanded / all/ have.

Answer: All Indian cities have expanded after 1960.

1. Live in/ of spaces / Indians / the most / crowded
Answer: Indians live in the most crowded of spaces.

2. Slums / at least / 35% of/ lives in/ urban India
Answer: At least 35% of urban India lives in slums.

3. Free of/ city is / dangers of/ no Indian/ pollution / the growing
Answer: No Indian city is free of the growing dangers of pollution.

4. At night / the stars / in the sky / difficult / to see/ it is
Answer: It is difficult to see the stars in the sky at night.

Mr. M. Sharma is the owner of K.P. Bakeries. He has made the following notes about a wedding cake to be delivered to Mr. John. He asks his personal assistant to write a brief note to Mr. John, using, using the information form the notepad given below, complete the notes choosing the correct options.

Mr. John— Cake ready
weighs 19 kg, thick layer of chocolate
names of bride and groom written
request — collect by 5 p.m.
not responsible — any damage afterward.

Dear Mr. John,

We are pleased to inform you that (a) the cake
you ordered is ready. It is a cake (b)

with a thick layer of chocolate on it.The names of
the bride and the groom (c) top.

Since it is a perishable item, (d)
collect it by 5 p.m. this evening. We shall not be
responsible if (e) afterward.

Yours truly,
M. Sharma
Proprietor (K.P. Bakeries)
Options:
a)
1) The cake you ordered
2) you ordered the cake
3) you order the cake
4) The cake you order

Answer:1) The cake you ordered

(b)
1) which weighs 10 kgs.
2) weighs 10 kgs.
3) weighing 10 kgs
4) 10 kg weight.

Answer:3) weighing 10 kg

(C)
1) Is written
2) Have been written
3) Has been written
4) Is being written.

Answer:2) Have been written

(d)
1) we request you
2) We are requesting you
3) we requested you
4) we request you.

Answer:4) We request you
(e)

1) It is damaged
2) It gets damaged
3) It is damaged
4) They are damaged

Answer:3) It is damaged

KSEEB Solutions For SSLC English Class 10 Prose Chapter 4 DR.B.R Ambedkar

KSEEB Solutions for SSLC Class 10 English Chapter 4 DR.B.R Ambedkar Points To Ponder

Babasaheb was a voracious reader, he bought books by curtailing his daily needs.

While in USA, he was drawn to the 14th amendment of the Constitution of the USA, which gave freedom to the Black Americans.

Babasaheb was greatly influenced by the life and work of Mahatma Phule and decided to devote all his time and talents for the amelioration of his underprivileged brethren.

He made effective contributions to the debates in the Assembly on a variety of subjects.

He was made the Chairman of the Drafting Committee of the Constituent Assembly.

He was the pilot of the various provisions of the Indian Constitution.

He defined the Constitution as a document which defines the position and power of the three organs ofthe State-the executive, the judiciary and the legislature.

He was the first Law Minister o f Indep endent India. It was a tribute to the success of Babasaheb Dr. Ambedkar’s own campaign against social injustice.

He brought equality of opportunities for the members ofthe scheduled castes and scheduled tribes.

Mahatma Gandhi and Dr. Ambedakr tried to proclaim oneness of the Hindu community. Gandfriji did so by reminding the higher castes of their duty towards the Depressed classes.

Babasaheb did the same by reminding them of their inherent rights to equality with the higher and more powerful castes.

KSEEB Solutions For SSLC English Class 10 Prose Chapter 4 DR.B.R Ambedkar

Dr. B.R. Ambedkar SSLC English Textual Exercises Check Your Understanding

Question 1. Ambedkar spent most of his life by
Answer: A-reading books.

Question 2. Pick out the word in the first paragraph which means ‘a quality that makes a person or a thing different from another.
Answer: Trait.

Question 3. How did the fourteenth amendment of the American Constitution benefit the Black Americans?
Answer: The Black Americans got freedom.

Question 4. What did Mahatma Phule work for?
Answer: Phule worked for the creation of a classless society and for the upliftment of women.

Question 5. Mookanayak, Bahishkrit Bharat and Samatawere
Answer: B-newspapers.

Question 6. Gandhiji termed the depressed classes as
Answer: Harijans.

Analysis Of Dr. B.R. Ambedkar SSLC English

Question 1. Draft is a banking term. How is the word used in the context of this lesson?
Answer: Draft means a version of a document that is prepared before it is finalised.

Question 2. Dr. Ambedkar was not in the Congress party. Yet he was made the Chairman ofthe Drafting Committee. Why?
Answer: Dr. Ambedkar was made the Chairman of the Drafting Committee because ofhis farsightedness and objective leadership ofthe Indian National Congress.

Question 3. He raised it ‘brick by brick’. In this context,what was raised?
Answer: The drafting ofthe Fundamental Rights in the Constitution.

Question 4. Who were the other notable members of the drafting committee?
Answer: Alladi Krishnaswami Ayyar, K. M. Munshi and N. Gopalswamy Ayyangar.

Question 5. Ambedkar had ‘rare gifts’. What were they?
Answer: Ambcdkar had ‘rare gifts ’ of unravelling the mo st complicated legal concepts in a language which the laymen understood.

Question 6. Constitution is a fundamental document to both the ruler and the ruled. How?
Answer: The purpose of a Constitution is not merely to create the organs of the State but to limit their authority, because, if no limitation was imposed upon the authority of the organs, there will be complete tyranny and complete oppression.

Question 7. Nehru chose Dr. Ambedkar the Law Minister for three reasons. What are they?
Answer: Nehru chose Ambedkar the Law Minister for three reasons. It was a recognition for his skills in the field of law and legislation. It is also as a tribute to his vision of social justice a vision of which was sought to be infused into the new Indian polity. And above all it was a tribute to the success of Babashaeb’s own campaign against social injustice.

Question 8. Are you aware of the facilities provided by the Social Welfare Department? Mention any two.
Answer: Students to answer.

Question 9. After independence, members of the Scheduled castes have found doors opened to them. How?
Answer: After independence, members of the Scheduled castes have been given equal opportunities in all fields. No legal bars exist today for self¬expression or self-advancement.

Question 10. All people should be given equal opportunities to prove themselves. How are the members of the Scheduled castes proving themselves?
Answer: They are enrolling themselves in institutions of higher offices of State, both at the centre and in the State. Judges, ambassadors and governors have been drawn from their ranks. And they have acquired themselves creditably in all these positions of responsibility.

Question 11.Babasaheb Ambedkar considers public agitation in free India as unconstitutional. Why?
Answer: Babasaheb Ambedkar considers public agitation in free India as unconstitutional. He observes that these methods can be utilized in a struggle against an alienpower. The right to rebellion is recognised against a government without people’s consent, be it alien or national dictatorship, but not in a democracy based on free and fair elections,

Question 12. What were the opinions of the Buddha and Awai regarding the caste divisions?
Answer: Buddha was of the opinion that the only valid divisions are the divisions between those who are noble and wholesome and those who are ignoble unwholesome. The Tamil poetess Awai was of the opinion that there are only two castes in the world, namely, the charitable who give and are superior and the misers who do not and are, therefore, inferior.

Question 13. Caste system in India is in strong position because of
Answer: its power structure.

Question 14. Why did the British magnify the caste distinction?
Answer: The British magnified the caste distinction because they wanted to break the unity of the people. They wanted to divide the people of India to strengthen their power and control over Indians.

Question 15. The word ‘hegemony’ means
Answer: control

Question 16. ‘They brought about a veritable revolution in social thought’.
a)Who are they?
Answer: Mahatma Gandhiji and Babasaheb Ambedkar.

b)what ‘revolution’ is referred to her?
Answer: To repudiate caste and to [proclaim the oneness of the Hindu community.

c)How did they bring about the revolution?
Answer: Gandhiji did so by reminding the higher castes of their duty towards the Depressed classes. Babasaheb Ambedkar did the same by reminding them of their inherent rights to equality with the higher and more powerful castes.

Question 17. Why did Nehru describe Dr. Ambedkar as a ‘symbol of revolt’?
Answer: Nehru described Dr. Ambedkar as a ‘symbol of revolt’. In many matters, he showed perseverance and persistence in rousing up the groups in our country which had suffered for so long in the past to fight for their rights. He was a prominent champion of the oppressed and depressed in India.

Class 10 SSLC English DR.B.R Ambedkar Think About The Text Answer The Following Questions Briefly

Question 1. Ambedkar had a great thirst for books when he was a student explained.
Answer: Dr. B.R. Ambedkar was a voracious reader. He had an insatiable thirst for books. He bought books by curtailing his daily needs. In New York he is said to have purchased about 2.000 old books. And it is recorded that at the time of the Second Round Table Conference in London, he bought so many books that they had to be sent to India in 32 boxes.

Question 2. How did the Fourteenth Amendment to the U.S Constitution and Mahatma Phule influence Ambedkar?
Answer: While in the USA, Dr. Ambedkar was drawn Fourteenth Amendment of the Constitution of the USA which gave freedom to the Black Americans. He saw at once the parallel of the situation for the Depressed Classes in India. On returning home, Babasaheb came to be greatly influenced by the life and work of Mahatma Phule, the votary of a classless society and women’s uplift. The need as well as the feasibility of reform impressed itself on Babasaheb’s mind and he decided to devote all his time and talents for the amelioration of his underprivileged brethren.

Question 3. There were great luminaries on the Drafting Committee. Dr. Ambedkar is remembered as the pilot. Give reasons.
Answer: There were great luminaries on the drafting committee, yet Dr. Ambedkar is remembered as the pilot as he explained to the Assembly the meaning and scope of the different provisions of the draft of the Constitution with a combination of tact, frankness and patience. He explained it in such a way that even a layman could understand it.

Question 4. Write a short note on Dr. Ambedkar’s idea/ perception of the three pillars of State.
Answer: Dr. Ambedkar had a clear Understanding of the mutuality of the three pillars of the state- The Legislature, the Executive and the Judiciary. He said that the jurisdiction of each should be clear and not hampered, so that the welfare of the citizen was safeguarded.

Question 5. What are the significant observations of Dr. Ambedkar’s idea/perception of the three pillars of State?
Answer: According to Dr. Ambedkar, Constitution is a fundamental document which defines the power and position ofthe three organs ofthe state- the Legislature, the Executive and the Judiciary. It defines the powers of the Executive and the Legislature and also the fundamental rights of the citizens. He said that the purpose of the Constitution is not merely to create the organs ofthe state, but to limit their authority because if there was no limitation upon their authority, there will be complete tyranny and oppression by them.

Question 6. Nehru chose Dr. Ambedkar as the law minister. What might have prompted Nehru to do so?
Answer: Jawaharlal Nehru chose Dr. Ambedkar to be the first Law Minister of independent India. This was recognition of Dr. Ambedkar’s skills in the field of law and legislation as also a tribute to his vision of social justice – a vision which was sought to be infused into the new Indian polity.

Question 7.What made Dr. Ambedkar describe the methods of Civil Disobedience, Non-cooperation and Sathyagraha as the ‘Grammar of anarchy’?
Answer: Dr. Ambedkar always stressed on the usage of constitutional methods to achieve social objectives. He described the methods of civil disobedience, non-cooperation and satyagraha as the ‘grammar of anarchy’ because he felt that it is fine to revolt against a government formed without people’s consent, but not in a democracy, based on free and fair elections. Such misdirected and volatile agitation will only result in the loss of lives and public property

Question 8.How did Dr. Ambedkar and Mahatma Gandhi try to wipe out caste discrimination from India?
Answer: Both Mahatma Gandhi and Dr. Ambedkar strived hard to wipe out caste discrimination and proclaim the oneness of the Hindu community. Gandhiji did this by reminding the higher castes of their duty towards the depressed classes. Dr. Ambedkar reminded the depressed classes, their right to equality with higher castes. While Gandhiji stressed on duties, Dr. Ambedkar emphasized on rights and brought about the revolution in social thought.

Dr. B.R. Ambedkar KSEEB Solutions Enrich Your Vocabulary

Task 1: Read the following paragraph and replace the underlined words appropriately with the words given below in brackets.

Children Have Special Qualities.

Question 1) They can think and imagine
Answer: Trait

Question 2) In creative ways and are able to understand
Answer: Conceive

Question 3)New things much better than their elders. But just by new ideas, nothing happens. Their ideas must have inbom
Answer: Perceive

Question 4) strengths and stand the test of time. They should not become self-satisfied
Answer: Inherent

Question 5) with their first steps of success.
Answer: Complacent

SSLC Class 10 English Chapter 4 DR.B.R Ambedkar Learn Grammar Through Communication

Task 1: Here are some sentences. Combine them using the linkers given in brackets. One is done for you.

Example: It rained heavily. We reached home in time,(though)

Answer: Though it rained heavily, we reached home in time.

Question 1. There is shortage of water. Some people are wasting it unthinkingly,(although)
Answer: Although there is shortage of water, some people are wasting it unthinkably.

Question 2. There was heavy traffic. We were delayed,(since)
Answer: Since there was heavy traffic, we were delayed.

Question 3. The students played for an hour. They attended to their studies later on.(and then)
Answer: The students played for an hour and then attended to their studies.

Question 4. We expected a difficult question paper. The questions asked in the examination were easy,(but)
Answer: We expected a difficult question paper but the questions asked in the examination were easy.

Question 5. The flight was delayed. The weather was cloudy,(as)
Answer: The flight was delayed as the weather was cloudy.OR As the weather was cloudy, the flight was delayed.

Question 6. The student scored less marks. He had not studied properly,(because)
Answer: The student scored less marks because he did not study properly.

Question 7. Make Reference

Syllabification
1. con-so-nant
2. fa-ther
3. col-lege
4. pa-per
5. con-ver-sa-tion
6. lit-tle

Apart of a word a vowel sound is a Syllable.
Of course, there are some exceptions like little.

Task 1 : Refer to a dictionary and split the following words into their syllables.

1. probability:- Prob-a-bl-i-ty
2. determination:- de-tcr-mi-na-tion
3. accept:- ac-cept
4. Canteen:- can-teen
5. again:- again
6. conscience:- con-science
7. idea:- i-dea
8. Reflection:- ref-lec-tion.

KSEEB Solutions For DR.B.R Ambedkar Interesting Language Activities For Formative Assessment

Find the antonyms for the following words in the lesson.

1. satiable x – Insatiable
2. Privileged x – under privileged
3. dependent x – Independent
4. Dying x – undying
5. ravelling x – Unravelling
6. Trammelled x- untrammelled
7. justice x – Injustice
8. Variably x – invariably
9. obedience x- Disobedience
10. Noble x – ignoble
11. inferiorx – Superior
12.Wholesome x – unwholesome
13.powerless x – Powerful

Get Into Pairs, Read The Lesson Carefully, And Choose The Correct Option To Complete The Sentences.

Question 1. One trait which marked Babasaheb during his student days was that he was
a) Very bold
b) Very intelligent
c) A voracious reader
d) A good leader

Answer: c) A voracious reader

Question 2. Babasaheb decided to devote all his time and talents for the amelioration of his underprivileged brethren
a) After his visit to the USA
b) After he was elected to the Bombay Legislative Assembly in 1935
c) With the help of Mahatma Gandhiji
d) When he came to be greatly influenced by the life and work of Mahatma Phule

Answer: d) when he came to be greatly influenced by the life and work of Mahatma Phule

Question 3. The word which is not a prefix but a part of the word is
a) Distinctive
b) Ignoble
c) Misdirected
d) Inanimate

Answer: a) Distinctive

Question 4. ‘calmly satisfied with oneself’ The one word meaning for the word is
a) Modest
b) Meek
c) Complacent
d) Introvert

Answer: c) Complacent

Question 5. ‘I litakami Sabha and the Independent Labour Party of India became the vehicles of change’. The figure of speech used here is
a) Simile
b) Metaphor
c) Personification
d) Alliteration

Answer: b) Metaphor

Class 10 SSLC English Chapter 4 DR.B.R Ambedkar Syllabification

How many syllables do the following words have?

Question1. Accept
Answer: ac-cept =2 syllables

Question2. Canteen
Answer: Can-teen = 2 syllables

Question3. Again
Answer: A-gain = 2 syllables

Question4. conscience
Answer: con-science – 2 syllables

Question5. Reflection
Answer: Rcl-lcc-lion =3 syllables

Question6. School
Answer: School = 1 syllable

Question7. Direction
Answer: di-rec-tion =3 syllables

Question8. People
Answer: Peo-ple –2 syllables

Question9. Quiz
Answer: Quiz=l syllable

Question10. Primary
Answer: Pri-ma-ry -3 syllables

Question11. Whole
Answer: Whole =1 syllable

Question12. Section
Answer: Sec-lion-2 syllables

Question13. continent
Answer: con-ti-nent =3 syllables

Question14. Taller
Answer: Tal-ler=2 syllables

Question15. Adventure
Answer: Ad-ven-ture =3 syllables

KSEEB Solutions Class 10 Chapter 4 English DR.B.R Ambedkar Scramble The Letters To Form Words Clues Are Given In Brackets

Question 1. Grade (tom)
Answer: Ragged

Question 2. eedd (agreement)
Answer: Deed

Question 3. Baoed (home)
Answer: Abode

Question 4. now (possess)
Answer: Own

Question 5. Areg (anger)
Answer: Rage

Question 6. Rcawl (move slowly)
Answer: crawl

Question 7. obthre (worry/trouble)
Answer: Bother

Question 8. Fletri (a little/very small)
Answer: Trifle

Question 9. ftalret (praise
Answer: Flatter

Question 10. Lgaem (shine)
Answer: Gleam

Question 11. Zoed (sleep)
Answer: Doze

Question 12. gola (prison)
Answer: gaol

Question 13. Fare (afraid)
Answer: Fear

Question 14. Rreor
Answer: Error

Question 15. cgarc (anxious)
Answer: Eager

Question Tags.

Note:
a) Affirmative sentences will have negative tags and negative sentences will have affirmative tags.
b) The tag is made with the pronoun of the subject. Add a suitable question tag and rewrite each of the following sentences:

Question 1. The bus is early today.
Answer: The bus is early today, isn’t it?

Question 2. There is no water in the tank.
Answer: There is no water in the tank, is there?

Question 3. People must keep the streets clean.
Answer: People must keep the streets clean, mustn’t they?

Question 4. People shouldn’t be ri.de to one another,
Answer: People shouldn’t be rude to one another, should they?

Question 5. The conductor will not give you change for Rs.100.
Answer: The conductor will not give you change for Rs. 100, will he?

Question 6. Our team will win the match.
Answer: Our team will win the match, won’t it?

Question 7. The flag has four colours on it.
Answer: The flag has four colours on it, hasn’t it?

Question 8. I have not answered your questions.
Answer: I have not answered your questions, have I?

Question 9. Plants give out oxygen during the day.
Answer: Plants give out oxygen during the day, don’t they?

Question 10. You shouldn’t disobey anybody.
Answer: You shouldn’t disobey anybody, should you?

Question 11. He never comes on time.
Answer: He never comes on time, does he?

Question 12. Girls like to keep dolls.
Answer: Girls like to keep dolls, don’t they?

Question 13. He missed the train yesterday.
Answer: He missed the train yesterday, didn’t he?

Question 14. You can do well in Physics too.
Answer: You can do well in Physics too, don’t you?

Question 15. The boys are regular to the classes.
Answer: The boys are regular to the classes, aren’t they?

Dr. B.R. Ambedkar’s Chapter Explanation For SSLC English Framing Questions

Given below are some answers. But the questions are missing. Frame suitable questions using one of the following questioning words for each question, ‘what, where, how, why, who, when, which’.

Question 1. Where is Karnataka located?
Answer: Karnataka is located in the Peninsular Plateau.

Question 2. What are the people of Karnataka called?
Answer: The people of Karnataka are called the Kannadigas.

Question 3. Which is the official language of Karnataka?
Answer: Kannada is the official language of Karnataka.

Question 4. How many districts are there in Karnataka?
Answer: There are thirty districts in Karnataka.

Question 5. When do we celebrate Rajyotsava Day?
Answer: We celebrate Kannada Rajyotsava on the first of November.

Question 6. Why is Karnataka called the Land of Sandalwood?
Answer: Karnataka grows plenty of Sandalwood trees. So it is called the Land of Sandalwood.

KSEEB Class 8 SSLC Biology Chapter 1 Transportation System in Plants Notes

KSEEB Class 8 SSLC Biology Chapter 1 Transportation System in Plants Notes Learning Objectives

  • Absorption of water and minerals (Osmosis and diffusion)
  • Transpiration in plants
  • Structure and function of xylem
  • Structure and function of phloem
  • Importance of minerals (macro and micronutrients)

Just like animals, plants also need energy from food to perform their daily activities. Green plants synthesize their own food by the process of photosynthesis. During this process, glucose and oxygen are produced. Oxygen is released into atmosphere and the glucose is transported to different parts of plants and is used to carry out different activities. The extra glucose is changed further into starch.

In everyday language ‘transport’ means ‘to carry things from one place to another’. In biology, transport is a life process in which a material absorbed (or made) in one part of the body of an organism is carried to other parts in its body.

Before we learn the transport of substances in plants, we should know the meaning of the term ‘tissue’. A tissue is a group of similar cells which work together to perform a particular function.

The arrangement of cells in a tissue depends on the function to be performed by the tissue. For example, if the function of tissue is to carry water from the roots of a plant to its leaves, then the tubular cells (tube-like cells) are arranged one over the other to form long tubes (or vessels’.

Those tissues which transport water, minerals and food to different parts of a plant, arc called vascular tissues. There are two types of vascular tissues in a plant: xylem and phloem.

  1. The tissue which carries water and minerals from the roots to the leaves of a plant is called xylem.
  2. The tissue which carries food from the leaves to other parts of the plant is called phloem.

All the parts of a plant like roots, stems, branches and leaves contain vascular tissues called xylem and phloem. The xylem and phloem tissues are a kind of tubes made of tubular cells arranged end to end. The xylem tissue is made of dead xylem cells whereas phloem tissue is made of living phloem cells arranged one over the other. Keeping these points in mind, we will now describe the transport system in plants.

KSEEB Class 8 SSLC Biology Chapter 1 Transportation System in Plants Notes

 

KSEEB Class 8 Biology Chapter 1 Transportation System In Plants Notes PDF 

Absorption Of Water And Minerals

Since water and minerals are mainly available in soil, a well- developed root system is present in plants to absorb water. Roots are covered by a single-cell layer called epidermis. The epidermal cells have finger¬like tubular outgrowth known as root hairs that increase the surface area for absorption of water.

transportationysteminplantshighlymagnified structureofroothair

As the number of root hair increases, the surface area also increases, and the plants absorb more water and minerals.

As the plants grow, their roots branch and re-branch and get fixed in the soil. At the tips of roots, a large number of cells absorb water and nutrients from the soil. These cells have a semipermeable plasma membrane. Plasma membrane has tiny pores that allow only selected materials and water molecules to pass through it by a process known as osmosis.

SSLC Class 8 Biology Transportation System In Plants Solutions 

Absorption Of Water

Since the concentration of water molecules is more in the soil than in root hairs, water enters the plants body through hair by the process of osmosis. Osmosis is a process by which the molecules of solvent (water) move from a region of higher concentration to a region of lower concentration through a semi permeable membrane. The concentration of water is higher in soil, thus water moves from soil to root cells, where concentration of water is lower, through plasma membrane.

transportationsysteminplantsabsorption ofwaterroothair

Due to osmosis, when water enters the roots, the xylem cells gets filled up and this puts pressure on the rigid outer cells of the root. This pressure causes the water to be forced up the plant against the gravity Thus, root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.

transportationsysteminplantsprocessofosmosis

Semi-Permeable Membrane

Activity -1

Aim: To demonstrate the process of osmosis.

Materials Required: A large-sized potato, petridish, sucrose solution Procedure:

1.Take a large-sized potato. Peel it and scoop a cavity in it. Slice its bottom to make its base flat.

2.Put the sliced potato in a petridish containing water in such a way that half of the potato is immersed in water.

3.Fill the potato cavity with 25% sucrose solution. Mark its level by inserting a pin.

4.Leave the apparatus undisturbed for some time.

Observations: The liquid in the cavity rises.

Inference: The liquid in the cavity rises because water (pure solvent) has moved through the potato walls and has accumulated inside the cavity. This happened because the concentration of water molecules in the cavity is lower due to the presence of sucrose molecules. It shows that water moves from a region of higher concentration to a region of lower concentration through a semi-permeable membrane. Potato wall acts as a semi-permeable membrane. The movement of water molecules proves that osmosis has taken place.

transportationsysteminplantspotatoosmosisPNG

In the above activity, potato wall acts as a semi- permeable membrane. In case, The potato is boiled, it loses its semi-permeable nature. We will discuss about diffusion in the later part of this chapter.

As discussed earlier, root hair cells have high concentration or osmotic pressure as compared to the surrounding cells. Due to this, water diffuses from outside into the root cells. The absorption of water in the root takes place by diffusion and osmosis.

Activity-2

Aim: To show that plants absorb water through roots.

Materials Required: A young leafy plant, a beaker and water Procedure:

1.Take some water in the beaker.

2.Put the young leafy plant in the beaker containing water.

3.Put some oil drops in the beaker to prevent evaporation.

4.Note the level of water.

5.Leave the apparatus undisturbed for some hours.

Observations: The water level reduces in the beaker.

Inference: The water level in the beaker reduces because the plant has absorbed the water from the beaker through its roots.

transportation-system-in-plants-root-absorption of-waterPNG

Notes For KSEEB Class 8 Transportation System In Plants

Absorption of Minerals

Calcium, potassium, magnesium and nitrogen are a few minerals required by the plants.

They are dissolved in water in the soil. The mineral absorption in plants takes place by means of two processes-diffusion and active transport.

Diffusion involves the movement of salt molecules from a region of higher concentration to a region of lower concentration. Diffusion takes place when the concentration of mineral molecules is higher in the soil in comparison to the root hair cells.

transportation-system-in-plants-absorption of-minarl-in-root

In case, the concentration of mineral molecules is low in the soil as compared to the root hair cells, the absorption of minerals takes place through active transport. Active transport is the movement of mineral ions from a region of lower concentration to a region of higher concentration. Generally, the concentration of minerals is low in the soil than inside the root hair cells. Thus, plants use active transport to absorb the mineral ions. Plants also require energy for this process.

Transportation In Plants

We have already studied that plants take up water and dissolved minerals from the soil through their roots and transport it to their leaves for the preparation of food. The leaves of plants prepare food by using water brought in from soil and carbon dioxide taken from air during photosynthesis. And this food has to be transported from the leaves to all other parts of the plant (which cannot make food themselves).

Plants have a transport system which serves two following purposes:

  • It carries water and minerals absorbed by the roots up to the leaves.
  • It also helps to transport the food made in the leaves to all other parts of the plant (including roots).

transportation-system-in-plantsPNG

In order to carry water and dissolved minerals, as well as prepared food, a plant has a transport system inside it. The transport system in plants consists of long tubes (or vessels) called xylem and phloem. In other words, xylem and phloem transport substances in plants. The xylem and phloem carry the various substances in ‘solution form’ up and down the plant and constitute the transport system of plant.

Detailed Explanation Of Transportation System In Plants KSEEB

Structure of Xylem

The complex vascular tissue called ‘xylem’ carries water and minerals dissolved in it (sap) from the roots upwards through the stem and branches up to the leaves.

  • Xylem has four different types of cells. They are tracheid; vessels or tracheae; xylem parenchyma; xylem sclerenchyma.
  • Tracheids are elongated dead cells. They provide mechanical support. They play an important role in transport of water.
  • Vessels or trachea form a row of cells placed end-to-end forming lube like structures called vessels. They are open from both the ends and provide mechanical support. They also help in transport of water and minerals.
  • Xylem parenchyma are the only living cells present in the xylem tissue.
  • They help in conduction of water and minerals. These parenchyma cells also store reserve food in the form of starch.
  • Xylem sclerenchyma are narrow and tapering cells and help provide mechanical strength to the tissue.
  • Except for parenchyma cells, rest of the xylem elements are bounded by thick lignified walls and are dead.

Functions

The xylem tissue forms a continuous network of vessels (or channels) that connect the roots to the leaves through the stem and branches, and thus transports water (and dissolved minerals) to the leaves of the entire plant. The water rises from the roots upwards towards branches and leaves in a plant. In a plant, water evaporates continuously from the leaves through the pores called stomata’. This process is called transpiration. It generates a ‘suction force’ which pulls up water absorbed by the roots from the soil to reach the leaves (through the stem and branches). The water and dissolved minerals (also called sap) move in an upward direction against the gravity to reach the leaves of the plant. This upward movement of sap (from the root to the top of a tree) is called ascent of sap. It is aided by transpiration and root pressure.

Structure of Phloem

The complex vascular tissue called ‘phloem’ carries the food from the leaves to all other parts of the plant (including roots). Phloem has four different types of cells. They are sieve lubes; companion cells; phloem parenchyma; phloem fibres.

  • Sieve tubes are long tube-like structures arranged longitudinally and are found in association with companion cells. The end walls are perforated just like a sieve to form sieve plates.
  • Companion cells are specialized parenchymatous cells. They form association with sieve tubes and help them in the conduction of food material.
  • Phloem parenchyma cells are cylindrical, elongated with tapering ends. They have cellulose in their cell wall. These cells store food and other substances.
  • Phloem fibres are made of sclerenchymatous cells. They are elongated with pointed apices and have thickened cell walls.
  • All the phloem cells are living except the phloem fibres.

Functions

The phloem tissue forms a network of vessels (or channels) that connect the leaves to all the parts of the plant including roots, and thus transports food to the entire plant. Please note that the food which is made in the leaves during photosynthesis consists of glucose (sugar) and it is transported within the plant in the form ol solution (called glucose solution’). The force needed to push the dissolved food (glucose solution) in phloem vessels is generated by the living phloem cells present in the phloem tissue of the plant.

Download KSEEB Biology Chapter 1 Notes Class 8

How Water Reaches From Soil to Xylem Vessels in Roots

We have just studied that water (and minerals dissolved in it) are carried from the roots of a plant to the leaves by the xylem vessels. Now, the xylem vessel of a root is in the centre of the root and it is surrounded by a large number of other  cells of the root. This means that the xylem vessel of a root is not in direct contact with the water present in the soil particles. So, an important question now arises: How does water from the soil reach the xylem vessel which is in the centre of the root of a plant? The answer to this question is that: For very short distances, water can move from cell to cell.

From the above discussion, we conclude that water (containing dissolved minerals) from the soil enters a plant through its root hair. From root hair, water moves from cell to cell in the root till it reaches xylem vessel in the centre of the root. From the xylem vessel in root, water moves upward to the xylem vessels in stem, branches and leaves.

transportation-system-in-plants-movement-of-water-in-soil

 

Activity -3

Aim to show that only roots absorb water for plants

Materials required: Test tubes, water, dyes, cork, oil, balsam plants

Procedure: Take three test tubes and mark them as 1. 2 and 3,. In test tubes 1 and 2 fill water up to three quarters. Fill test tube 3, less than a quarter with water.

In case of test tube 1, fix a cork at its mouth and leave it. Now, take two small-sized balsam plants having their roots intact. Wash their roots properly to remove soil and other particles. Now, in case of test tube 2, place a balsam plant so as its roots remain dipped in water. In case of test tube 3, insert the plant so that its roots do not touch water and are placed well above it.

In test tube 2 add a few drops of caramine dye (pinkl. Pour some drops of oil in test tube 2 which will float on the surface of water and prevent evaporation. Now*, mark the water level in all the three test tubes and leave them undisturbed for 24 hours.

transportation-system-in-plants-test-tube-1-test-tube-2

Observation:

Test Tube 1: After 24 hours, it was observed that water level in test tube 1 remains unchanged. This shows there was no loss of water due to evaporation.

Test Tube 2: Water level falls below the marked level. The pink colour of dye can be seen in the veins of leaves. As water cannot evaporate due to presence of oil, so the lost water is taken up by plants through roots. Test Tube 3: The water level has gone down but the eaves of the plants have shriveled. Leaves lost water due to transpiration but that water wasn’t replenished as roots were not in contact with water. The water evaporated from the surface.

This experiment shows that a plant absorbs water through its roots.

Activity*4

Aim: To study the transportation of water through xylem tissues.

Materials Required: A soft flowering twig with roots intact (with white flowers of Petunia, Balsam or Vinca), pink ink, beaker, water, microscope

Procedure

Pour some water in the beaker. Add a few drops of pink ink to the water.

Put the twig in the beaker and leave it undisturbed for an hour.

Cut thin slices of stem on a glass slide.

Keep the sliced stem on the glass slide.

Put a few drops of water on the slide and observe the stem under Xylem transports water microscope.in plants

transportation-system-in-plants-activity

 

Observations: The xylem tissue of the vascular bundle gets stained pink

Inference: Xylem tissue helps in conduction of water.

KSEEB SSLC Biology Class 8 Transportation In Plants Summary

Activity-5

Aim: To demonstrate that food is transported through the phloem.

Materials Required: A plant pot, water, a healthy plant with thick stem

Procedure:

  1. Take a healthy plant with thick stem.
  2. Cut a ring around the stem of the plant deep enough to penetrate the phloem and cambium but not the xylem.
  3. Fix the plant in the plant pot. Water the plant regularly.
  4. Leave the apparatus for a few days.

Observations: The part of the stem above the ring has grown in diameter while the growth of the stem below the ring has stopped.

Inference: The stem above the ring shows the growth in diameter because of the accumulation of food

manufactured in the leaves. There is no growth in the lower portion because the removal of phloem blocked the downward movement of food.

 

transportation-system-in-plants-phloem-conduct-food

Transpiration

Loss of water from the plant in the form of water vapour is known as transpiration. In plants, transpiration takes place from different regions— stomatal, cuticular and lenticular.

  1. Stomatal transpiration: Evaporation of water from the leaves talcing place through the stomata is called stomatal transpiration.There are more stomata present on the undersurface of a dicot leaf. Therefore, more transpiration takes place from the lower surface of leaf.
  2. Cuticular transpiration: When the evaporation of water takes place direedy from the surface of the leaves and herbaceous stems, it is known as cuticular transpiration.
  3. Lenticular and bark transpiration: When evaporation of water takes place through the lenticels and the bark, it is called lenticular and bark transpiration.

Transpiration is directly proportional to absorption. Higher the rate of transpiration, more will be the rate of absorption. Rather, transpiration plays an important role in the absorption of water.

The loss of water from the leaves through transpiration creates a suction pressure in the xylem vessels. The suction pressure pulls up water from the roots dirough the stems to the leaves. This is called transpiration pull.

It causes a reduction in the volume of water in the roots. That in turn causes the movement of water from the surrounding soil to the root hair. The root hairs absorb the water by the process of osmosis. Thus, the cycle continues.

When the rate of transpiration is greater than the rate of absorption of water from the root hair, the leaves, stems and flowers of the plant begin to droop. This is called wilting.

Factors Influencing Transpiration

Some of the factors which influence the rate of transpiration are discussed here:

Temperature: The rate of transpiration increases with increase in temperature. High temperature favours evaporation of water from the leaves.

Light: During day time, stomata remains open hence most of the transpiration lakes place during the day. At night, the stomata remain closed, so very little amount of water is lost by cuticular or lenticular transpiration.

Humidity: The amount of water content of air is known as humidity. This humidity is expressed as vapour pressure. With increase in humidity, the rate of transpiration decreases. The rate of transpiration increases, if the hum idity is low, that is, vapour pressure in the surrounding atmosphere is low.

Wind speed: The rate of transpiration increases in moving air (or wind). This is because moving air carries away water vapour from leaves as fast as it comes out of stomata. And when the rate of transpiration increases, then the rate of absorption of water through the roots also increases. Thus, water absorption through roots can be increased by keeping a potted plant under the fan.

Free KSEEB notes on Class 8 Biology Transportation System

Importance of Transpiration

The process of transpiration (evaporation of water from leaves) serves a very useful function in the plants.

  • It generates a ‘suction force’ in xylem which can pull water from the roots up to great height in the tall trees.
  • When cells absorb water, they remain turgid. This helps in maintaining the shape and structure of the plant body.
  • Another function of transpiration is that it cools the plant in hot weather. This happens due to cooling caused by evaporation.
  • The main function of stomata is to allow carbon dioxide to enter into the leaves for photosynthesis. It simultaneously functions to prevent excessive water loss.

Transpiration can be demonstrated by the following methods:

Method 1:

Take a small-potted plant and cover the soil surface In the pot with the polythene sheet.

Now cover the potted plant with a big glass bell jar. Keep the set-up under the sun and leave it undisturbed for few hours. Moisture droplets appear on the inner walls of the glass bell jar. The moisture in the bell jar comes from transpiration.

transportation-system-in-transpiration-of-water-through-leaves

Method 2:

This method is used to compare the rate of transpiration between the two surfaces of the same leaf suggesting that more stomata are present in the lower surface of the leaf.

Take two strips of filter paper soaked in 2 % solution of cobalt chloride and leave them to be perfectly dried under sunlight. Cobalt chloride paper is blue in colour when it is dry, and becomes pink when it absorbs moisture. Due to this characteristic feature, it acts as a chemical indicator in this experiment.

A piece of dry blue cobalt chloride paper is kept on a leaf. It is covered by a glass slide with clips. The colour of cobalt chloride changing from blue to pink shows transpiration. The time taken for this change determines the rate of transpiration.

Importance Of Minerals

Minerals are very important for the healthy growth of plants. These are absorbed through the roots in the dissolved form along with water. The minerals (nutrient elements) required by the plants are divided into two categories— macronutrients and micronutrients. Macronutrients are the mineral elements that are required in large quantities by the plants. They play an important role in balanced crop nutrition. They include nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), sulphur (S) and so on.

Micronutrients are required in extremely small quantities by the plants. They include iron (Fe), manganese (Mn), zinc (Zn) and many more.

Chapter 1 Transportation System In Plants Keywords

Osmosis: The diffusion of water {or solvent) across semi permeable membrane from a region of its high concentration to a region of its lower concentration

Diffusion: The movement of fluid from the region o* higher concentration to the region of lower concentration

Active transport: The transport of substances across the cell membrane against concentration gradient with the input of energy

Sap: Water and dissolved minerals that are conducted by a plant

Root pressure: The pressure that develops in xylem vessels as a result of metabolic activity of roots Transpiration: The process that causes loss of water in the form of water vapour through the aerial parts of a plant

KSEEB Class 8 SSLC Biology Chapter 1 Transportation System In Plants Summary

  • In biology, transport is a life process in which a rraterial absorbed (or made) in one part of the body of an organism is carried to other parts in its body.
  • Those tissues which transport water, minerals and food to different parts of a plant, are called vascular tissues. There are two types of vascular Tissues in a plant: xylem and phloem.
  • Since water is mainly available in soil, a well-developed root system is present in plants to absorb water.
  • Osmosis is a process by which the molecules of solvent (water) move from a region of higher concentration to a region of lower concentration through a semi permeable membrane.
  • Root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.
  • The absorption of water in the root takes place by diffusion and osmosis.
  • The mineral absorption in plants takes place by means of two processes-diffusion and active transport.
  • The complex vascular tissue called ‘xylem’ carries water and minerals dissolved in it (sap) from the roots upwards through the stern and branches up to the leaves. This upward movement of sap (from the root to the top of a tree) is called ascent of sap.
  • The phloem tissue forms a network of vessels (or channels) that connect the leaves to all the parts of the plant including roots, and thus transports focd to the entire plant.
  • Loss of water from the plant in the form of water vapour is known as transpiration. In plants, transpiration takes place from different regions— lenticular, cuticular and stomatal.
  • Minerals are very important for the healthy growth of plants. These are absorbed through the roots in the dissolved form along with water. The mine’als (nutrient elements) required by the plants are divided into two categories— macronutrients and micronutrients.

 

Part A – Our PASTS – III (History)

Part B – Resources and Development (Geography)

Part C: Social and Political Life -III (Civics)

 

KSEEB Class 9 SSLC Biology Chapter 1 The Fundamental Unit Of Life Notes

KSEEB Class 9 SSLC Biology Chapter 1 The Fundamental Unit Of Life Learning Objectives

  • After Completing This Chapter, You Will Be Able To
  • Recognize Cell As The Basic Structural And Functional Unit Of Living Beings;
  • Differentiate Between Prokaryotic And Eukaryotic Cells;
  • Draw And Describe The Structural Organization Of Plant And Animal Cells And State Their Functions;
  • Describe The Process By Which Food And Water Move From
  • List The Mariner In Which The Cells Of Imng Organisms
  • Exchange Substances With The External Environment
  • And Describe The Process By Which They Obtain These Substances.

IN Earlier Classes, You Have Studied That All Living Beings Arc Composed Of Cells. A Cell Is The Structural And Functional Unit Of Life. Any Function Performed By An Organism Is The Outcome Of The Activity Of The Cell. A Cell Can Exist Independently On Its Own And Perform All The Life Processes. Many Cells Come Together To Form A Tissue And Tissues Collectively Form Organs. 71ms, Every Organ In Our Body Is Made Up Of Hundreds Of Thousands Of Cells.

KSEEB Class 9 SSLC Biology Chapter 1 The Fundamental Unit Of Life Notes

Discovery Of Cell

  • Cells Were Discovered By Robert Hooke In 1665. The Invention Of Microscope Helped In The Discovery Of The Cell. Robert Hooke (1635-1703) Developed A Primitive Microscope By Using Two Lenses For Achieving Greater Magnification. In Such A Microscope, The Object To Be Seen Was Placed On A Stage Below And Light Coming From An Oil Flame Was Thrown On It By A Convex Mirror.
  • He Observed Atliin Slice Ofcork (A Substance Obtained From The Bark Of A Tree) Under His Primitive Microscope. He Observed That The Cork Slice Had A Large Number Of Compartments Joined Together In A Honcycomb- Iike Pattern. He Named These Compartments As Cells (The Word Cell Comes From A Latin Word Celia Meaning A Compartment Or A Little Room). ’Ihis Was For The First Time That Anyone Had Observed That Living Things Consist Of Separate Units Called Cells.
  • In 1674, Anton Von Leeuwenhoek (1632-1723) Made Further Improvements And Constructed A Simple Microscope That Could Magnify Up To 270 Times.

The-fundamentals-unit-of-life-Robert-hooks-microscope

Class 9 KSEEB Biology Chapter 1 notes Fundamental Unit of Life 

Cell – The Fundamental Unit Of Life

Let Us Perform The Following Activity To Find Out More About Cells.

Activity-1

  • To Prepare Temporary Stained Mount Of Onion Peel To Study Epidermal Cells
    You Will Need
  • Onion Bulb, Forceps, Watch Glass, Glass Slide, Camel Hair Brush, Covcrslip, Knife, Water, Razor Blade, Mounting Needle, Safranin Solution, Glycerine And Microscope.

Procedure

  • Take An Onion Bulb, And Discard The Brown, Outer Dry Scales. With The Help Of A Knife, Cut The Onion Bulb Into Four Pieces. Remove One Fleshy Scale.
  • Bend The Outer (Convex) Surface Of The Fleshy Scale Towards Yourself. Do Not Break It Completely So That The Two Halves Remain Attached By A Thin Transparent Strip Of Epidermal Peel.
  • Gerilly Pull Llie Broken End. You Will Find Dial Die Thin Transparent Layer Of Epidermis Is Peeled Off Easily. Using A Pair Of Forceps, Remove The Peel And Place It On A Watch Glass Containing Water. ‘Ihis Will Prevent The Peel From Getting Folded Or Dry.
  • With The Help Of A Blade, Cut A Square Piece Of This Peel And Place It In A Drop Of Water On A Clean Glass Slide With The Help Of A Fine Camel Hair Brush. Make Sure That The Peel Is Perfectly Flat On The Slide.
  • Put A Drop Of Safeanin Solution On The Ped To Stain It And Leave It For 2-3 Minutes. Put A Drop Of Glycerine Solution Over It To Prevent It From Drying With The Help Of A Mounting Needle, Cover The Peel With A Coverslip, Taking Care That There Are No Folds Or Air Bubbles In It

 

Fundamentals-unit-of-life-preparation-of-a-temporary-stained-mount-of-onion-peel

  • Observe The Slide Under The Low Magnifying Power Of The Microscope. For Better Details, Increase The Magnification And Observe Under The High Power Of The Microscope.

Observations

  • While Observing The Slide Under The Microscope, You Will Observe That The Epidermis Is One Cell Thick. These Structures Or Cells Look Similar To Each Other- Each Cell Has A Cell Wall, Cell Membrane, Nucleus, Cytoplasm And A Vacuole.

Fundamentals-unit-of-life-epidernal-cells-of-onion-peel

  • The Cells That You Observed In The Above Activity Are The Basic Building Units Of The Onion Bulb. The Cells Of Onion Peel Are Rectangular Or Polygonal In Shape .All The Cells Are Firmly Bound Together. Like Onion, All Organisms Are Made Up Of Cells. Some Organisms Arc Made Up Of One Cell While Others Arc Made Up Of Many Cells.

Microscope

  • A Microscope Is An Instrument Which Is Used To Observe Objects That Are Invisible To The Naked Eye. For Example, Plant And Animal Cells, Bacteria, Fungi And Algae Can Be Observed Under A Microscope. Tire Two Common Types Of Microscopes Arc Compound Microscope And Electron Microscope.

The Compound Microscope

  • The Ordinary Light Or Compound Or Optical Microscope Used Extensively In Laboratories These Days Is A Greatly Improved Design Of Hooke’S Microscope It Consists Of Two Lenses, Namely, The Eyepiece Lens And The Objective Lens, Which Arc Combined To Produce A Greater Magnification. The Light Microscope Has A Magnification Up To 1500 Times, Good Enough To See Cells, Larger Organelles And Bacteria.

Fundamentals-unit-of-life-light-microscope-electron-microscope

KSEEB Class 9 Biology Chapter 1 The Fundamental Unit Of Life Explained 

Electron Microscope

  • An Electron Microscope (Em) Has Much Greater Powers Of Magnification And Resolution Than Those Of An Optical (Light) Microscope. An Electron Microscope Can Resolve Points 1 Nm Apart. In This Microscope, A Beam Of Electrons Is Passed Through The Section Of A Material
    To Produce The Image. The Electron Beam Passing Through The Specimen Section Is Focused By Electromagnets And Is Projected Onto A Fluorescent Screen For Direct View Or Onto A Photographic Plate For Permanent Recording. The Resulting Photograph Is Called An Electron Micrograph.

Electron Microscope Activity-2

  • To Prepare Temporary Stained Mount Of Leaf Peels, Root Tips Of Onion And Peels Ol Onion Of Different Sizes And Observe Epidermal Cells.
    You Will Need
  • Tradescantia Leaf, Onion Bulbs Of Different Sizes, Onion Roor Tips, Forceps, Watch Glass, Glass Slide, Water, Razor Blade, Iodine Solution And Microscope

Procedure

  • For Preparing The Temporary Stained Mounts Of Peels Of Onion Bulbs Of Different Sizes, Follow The Steps Of Activity 1 As Given Before. Observe Different Sections Under A Microscope And Compare Their Structures.
  • For Preparing The Temporary Stained Mount Of Leaf Peels, Tale The Leaf Of Tradtscaniia Plant. Take Out A Small Segment Of Peel From The Lower Surface Of The Leaf With A Jerk. Make T Temporary Mount Of This Peel As Mentioned In Activity 1 And Observe Under The Microscope.
  • Similarly, You Can Prepare Temporary Stained Mount Of Onion Root Tips To Observe Epidermal Cells.

difference-between-observation-interface

Observations

  • What Do You Observe In The Above Activity? Do All Cells Look Similar With Regard To Shape And Size? Do All Cells Look Similar In Terms Of Structure? Do You Observe Any Difference Or Similarity Among Cells From Different Parts Of The Plant?

Activity-3

To Prepare A Temporary Mount Of Human Cheek Cells And Observe It Under A Microscope
You Will Need

A Clean Ice-Cream Spoon, Methylene Blue Solution, Glass Slides, Water, Needle And Microscope.

Procedure

  • Take An Icc-Crcam Spoon And Gently Scrape The Inner Lining Of Your Cheek. It Will Collect Some Viscous Transparent Material. With The Help Of A Clean Needle, Transfer This Material On A Clean Glass Slide.
  • Add A Drop Of Water To The Smear. Also Add A Drop Of Methylene Blue Solution To If. Leave The Preparation For About 1 Minute. Methylene Blue Is Used To Stain The Nucleus In A Cell Gently Place A Coverslip Over The Material With The Help Of A Needle To Avoid The Entry Of Air Bubbles. Press It Gendy In Between Folds Of A Rough Filter Paper To Remove Excess Fluid And For Uniform Distribution Of The Cells In The Mount Prepared.
  • Observe Under A Microscope And Find Out The Structural Details Of Cheek Cells.

Fundamental-unit-of-life- human-cheek-cells

Observation

What Do You observer What Is The Shape, Of The Ri*Fk You See? Draw It On The Observation Sheet.

Inference

  • Under High Power Of A Compound Microscope, You Will Observe A Darkly Stained, Oval Or Spherical Dot-Like Structure Near The Centre Of The Cell.This Is The Nucleus. The Nucleus Is Surrounded By The Cytoplasm.
  • The Cell Membrane Forms The Boundary Of A Cell Similar Structures (Nucleus) Were Also Found In The Onion Peel Cells. You Will Also Find That There Is No Large Central Vacuole Or Cell Wall As Observed In The Onion Peel (Plant) Cells.
  • On The Basis Of Above Activities We Can Summarize That:
  • A Cell Is The Structural And Functional Unit Of Living Beings.
  • It Is Capable Of Independent Existence And Performs Essential Functions Of Life.
  • A Cell Is Usually Microscopic (Ie. Invisible To The Naked Eye) In Nature.
  • It Consists Of A Mass Of Protoplasm Surrounded By A Selectively Permeable Plasma Membrane.
  • In An Animal Cell, The Plasma Membrane Is The Only Limiting Membrane. However, In Plant Cells, Fungi And Bacteria, The Cell Is Also Surrounded By A Cell Wall.
  • All Organisms Start Their Life As A Single Cell. Every Cell Has Its Own Lifespan. The Old And Worn Out Cells Are Continuously Replaced By New Cells Except Few Cells Including Neurons.
  • Many Cells Collectively Form A Tissue And Many Tissues Together Form An Organ. The Organs Work Together As A System For The Purpose Of Survival.

Class 9 SSLC Biology Chapter 1 KSEEB Key Points 

Cell Theory

  • The Cell Theory Was Proposed By German Botanist Matthias Schlcidcn (183$) And German Physician Theodore Schwann (1839). Later On In 1855, Rudolf Virchow, A German
  • Pathologists added The Phrase Ottmis Cellula-E-Cdlula Meaning All Cells Arise From Pre-Existing Cells. The Major Points Of The Cell Theory Are As Follows:
  • All Living Organisms Are Composed Of Cells.
  • A Cell Is The Basic Structural And Functional Unit Of All Living Beings.
  • All Cells Arise From Pre-Existing Cells.

Exceptions To Cell Theory

  • Viruses Arc Non-Cellular Organisms. They Do Not Have Nucleus, Cytoplasm Or Enzyme And Do Not Perform Any Life Activity. They Can Multiply Only Inside The Living Host By Taking Over Their Machinery.
  • Bacteria And Blue-Green Algae Are Not True Cells. They Do Not Have A Nuclear Membrane And Membrane Bound Cell Organelles.

Fundamental-unit-of-life-some-unicellular-organisms

Unicellular And Multicellular Organisms

  • On The Basis Of The Number Of Cells, There Are Basically
    Two Types Of Organisms – Unicellular And Multicellular.
  • Unicellular (Uni Means Single) Organisms Are Made Up Of Only One Cell. For Example, Amoeba, Chlamydomonas, Euglena, Paramecium, Trypanosoma And Bacteria Are Unicellular Organisms.
  • Multicellular (Multi Means Many) Organisms Are Made Up Of Many Cells That Group Together To Perform Many Functions Of The Body. For Example, Fungi, Plants And Animals Are Multicellular Organisms. All Multicellular Organisms Have Been Derived From A Single Cell, Zygote, Through Cell Division.

Prokaryotic And Eukaryotic Cells

On The Basis Of Their Nuclear Organization, Cells Have Been Classified Into Two Types:
• Prokaryotic Cells
• Eukaryotic Cells

Prokaryotic Cells(Gk. Pro: Before, Karyon: Nucleus)

  • Prokaryotic Cells Are Single-Celled And Lack A Nuclear Membrane. These Cells Have Primitive Organization Of Genetic Material. The Genetic Material Is Equivalent To A Single Molecule Of A Circular Dna. These Cells Have An Undefined Nuclear Region Called The Nucleoid Due To Absence Of Nuclear Membrane. These Cells Lack Several Cytoplasmic Organelles Like Mitochondria, Lysosome, Endoplasmic Reticulum, Chloroplast And Nucleolus.
    Many Of The Functions Of These Cells Are Performed By Poorly Organized Parts Of Cytoplasm. Bacteria And Blue-Green Algae Are Examples Of Prokaryotic Cells.

Eukaryotic Cells
(Gk. Eu: True, Karyotv Nucleus)

  • Eukaryotic Cells Have A Well-Defined Nuclear Membrane. In These Cells, The Genetic Material Is Made Of Two Or More Linear Dna Molecules In The Nucleus, Enclosed In A Nuclear Membrane. These Cells Thus Have A Well- Organized Nucleus. These Cells Have Well-Developed Membrane-Bound Organelles, Such As Mitochondria, Endoplasmic Reticulum, Lysosome, Chloroplast And Nucleolus. Eukaryotic Cells Occur In Plants, Animals, Fungi And Protozoa.

Cell – Shape, Size And Function

  • Different Organisms Have Cells Of Different Kind. The Shape And Size Of Cells Are Related To The Specific Functions Performed By The Organisms.

Cell Shape

  • Cells Show A Great Variation In Their Shapes (Fig. 1.8). Most Cells Have A Definite Shape. Cells May Be Spindle-Shaped – Muscle Cells, Elongated – Nerve Cells, Oval – Red Blood Corpuscles, Cuboidal – Germ Cells, Branched – Osteocytes And So On.
  • Some Cells May Not Have Any Definite Shape, For Example, Amoeba And Leucocytes (White Blood 14 Corpuscles).

Fundamental-unit-of-life- shapes-of-different-cells-in-human-body

KSEEB Biology Chapter 1 The Fundamental Unit of Life Questions And Answers 

Cell Size

  • The Smallest Known Cell Is Mycoplasma Or Pplo (Pleuropneumonia-Like Organism). Its Size Is 0.1 To 0. 5 Pm (Micrometre).
  • The Bacterial Cell Is 0.5 To 5 Mm, Human Red Blood Corpuscles Are 7 To 20 Mm, Human Liver And Kidney Cells Arc 20 To 30 Mm And Nerve Cells Are About 90 To 100 Cm In Size.

Cell Function – Division Of Labour

  • Each Cell Performs Certain Basic Functions That Are Characteristics Of All Living Beings. There Is A Division Of Labour In Multicellular Organisms And Also Within A Single Cell In Many Cases. This Means Different Parts Of The Body (Organs) Perform Different Functions. This Is Because Each Cell Has Certain Specific Components Within It Known As Cell Organelles. Each Cell Organelle Performs A Specific Function, Such As Producing Energy, Making New Materials (Proteins, Etc.), Clearing Up The Waste Material, Etc. These Organelles Together Constitute The Basic Unit, I.E. The Cell. A Cell Is Able To Perform Its Functions Because Of These Cell Organelles.

Structural Organization Of A Cell

  • You Have Just Studied That Each Cell Has Special Components Called Cell Organelles. Although Cells Of Different Organisms Differ In Structure, Cells Within The Body Of A Multicellular Organism Also Differ In Shape, Size And Functions. In Spite Of These Differences, Every Cell Shows The Same Basic Structure – Cell Membrane Or Plasma Membrane, Nucleus And Cytoplasm. The Generalized Structures Of A Plant Cell And An Animal Cell Are Given

Fundamental-unit-of-life-ultrastructure-of-a-plant-cell-and-animal-cell

Cell Membrane Or Plasma Membrane

  • Ever Cell Is Bound By A Thin Delicate Membrane Called Cell Membrane Or Plasma Membrane.
  • Plasma Membrane Is The Outermost Covering Of The Cell Which Separates The Contents Of A Cell From Its External Environment.
    We Can Sec Plasma Membrane Only With The Help Of An Electron Microscope. Structurally, Plasma Membrane Is Very Flexible. It Is Made Up Of Organic Molecules Called Lipid (Which Are Present In A Viscous Bilayer) And Protein (Within Lipid Bilayer).
  • The Flexibility Of Plasma Membrane Helps The Cell To Engulf In (Take In) Food And Other Substances From Its External Environment. This Process Of Engulfing Food And Other Material From The Outside Environment Is Known As Eudocytosis. Protozoans Like Amoeba Get Their Food Through endocytosis.

Fundamental-unit-of-life- cell-membranes

 

Functions

  • Plasma Membrane Is Selectively Permeable. Therefore, It Allows Or Permits Die Entry And Exit Of Only Selected Substances. It Prevents The Movements Of Some Other Substances Across It
  • Plasma Membrane Bounds The Semi-Fluid Content Of The Cells.
  • It Protects Die Cell From Injury And Provides An Outer Boundary To The Cell.
  • It Allows The Flow Of Materials And Information Between Different Organelles Within Die Cell As Well As Between One Cell And Another.
  • It Has Carrier Proteins For Active Transport
  • How Does Movement Of Substances Take Place In And Out Of Cells?
  • The Movement Of Substances, In And Out Of The Cells, Occurs Through The Following Processes:
  • Diffusion Osmosis

Diffusion

  • The Movement Of The Molecules Of A Substance From Die Region Oftheir Higher Concentration To The Region Of Their Lower Concentration Is Called Diffusion.
  • Importance Of Diffusion.
  • Diffusion Plays An Important Role In Gaseous Exchange Between The Cells As Well As Between The Cell And Its Outside (External) Environment.
  • It Is A Means Of The Movement Of Ions And Molecules Throughout Die Protoplast.
  • Transpiration From Stomata Occurs By Diffusion.
  • Aroma (Smell) Of Flowers Is Due To Diffusion Of Aromatic Compounds Of Flowers To Attract Pollinators.
  • Carbon Dioxide Moves Out Of Die Cell Through Diffusion: There Are Many Metabolic Activities Like Respiration Taking Place Inside The Cell. During Cellular Respiration, Waste Like Carbon Dioxide Is Produced. This C02 Accumulates In The Cell In High Concentration. On The Other Hand, Concentration Of C02 Outside The Cell Is Lower Than That Inside The Cell. As A Result, C02 Moves From A Region Of Its High Concentration (Inside Die Cell) To A Region Of Low Concentration (Outside The Cell) Through The Process Of Diffusion. This Process Continues Till An Equilibrium (Even Distribution) Is Reached. The Diffusion Slows Down As Equilibrium Is Approached.
  • Oxygen Moves Inside Die Cell Through Diffusion: Inside Die Cell, Oxygen Is Regularly Needed For Respiration And Other Metabolic Reactions. Thus, Die Concentration Of Oxygen Inside Die Cell Decreases. As A Result, Oxygen Moves From A Region Of Its High Concentration (Outside The Cell) To A Region Of Its Low Concentration (Inside The Cell).

KSEEB Biology Class 9 Chapter 1 Notes With Diagrams 

Osmosis

  • The Diffusion Of Water Molecules Through A Scmi-Pcrmeable Membrane From A Region Where Water Is More Concentrated To A Region Where It Is Less Concentrated Is Called Osmosis.
  • In Other Words, Osmosis Is The Diffusion Of Water From Its Pure State Or Dilute Solution Into A Stronger Or Concentrated Solution Through A Semi-Permeable Membrane.

Importance Of Osmosis

  • Entry Of Soil Water Into Roots Occurs Through Osmosis.
  • Cell To Cell Movement Of Water Occurs Through Osmosis.
  • Living Cells Remain Turgid By Osmosis.
  • The Stomata Open And Close In Response To Increase Or Decrease In Osmotic Pressure Of The Guard Cell.

Activity-4

  • To Study Osmosis With The Help Of An Egg Yoa Will Need
    A Hens Egg, Glass Beakers, Dilute Hydrochloric Acid, Salt
    Solution And Water

Procedure

Take A Hen’S Egg And Remove Its Shell By Placing It In Dilute Hydrochloric Acid For Some Time. Since The Egg Shell Is Mosdy Calcium Carbonate, It Dissolves In Dilute Hcl
As The Egg Shell Is Dissolved, A Thin Outer Skin
Encloses The Egg. Put The Egg In Water For 5 Minutes And Observe.
What Do You Observe?

Observation 1

You Will Observe That The Egg Swells Because Water Passes Into It By Osmosis.
‘• Now, Take Another De-Shelled Egg And Place It In A Concentrated Salt Solution.
Again Observe For 5 Minutes. What Do You Observe?
Observation 2

You Will Observe That The Egg Shrinks. This Is Because Water Passes Out Of The Egg Into The Salt Solution As The Salt Solution Is More Concentrated.

Fundamental-unit-of-life- differrences-between-osmosis

 

Fundamental-unit-of-life-Behaviour-of-a-plant-cell-placed-in-solution-of-different-concentration

 

Fundamental-unit-of-life- diffusion-osmosis
Isotonic, Hypotonic, And Hypertonic Solutions

  • If You Take A Plant Cell And Place It In Solutions Having Different Concentrations, Then You Will Find That The Cell Shrinks In Hypertonic Solution, Swells In Hypotonic Solution While It Remains Unchanged In Isotonic Solution

If The Cell Is Kept In An Isotonic Solution

  • Isotonic Solution Is One Which Has The Same Water Concentration As That In The Cell. In Such A Solution, There Is No Net Movement Of Water Across The Cell Membrane. In This Case, There Is A Movement Of Water Across The Cell Membrane In Both Directions. However, Tlie Amount Of Water Entering Die Cell Is Exaedy the Same As The Amount Of Water Leaving The Cell. As A Result, There Is No Overall Or Net Movement Of Water And Cell Retains The Same Size.

Fundamental-unit-of-life-isotonic-solution

If The Cell Is Kept In A Hypertonic Solution

  • In A Hypertonic Solution, The Concentration Of Water Molecules In The Outside Medium Is Lower Than That Inside The Cell. That Means The Solution Becomes Very Concentrated. Water Moves Through The Cell Membrane In Both Directions, But More Water Leaves The Cell Than Entering It As A Result, The Cell Shrinks.

If The Cell Is Kept In Hypotonic Solution

  • In Hypotonic Solution, The Medium Surrounding The Cell Has Higher Water Concentration Than Inside The Cell. If You Place A Plant Cell In Hypotonic Solution, Then The Cell Will Swell Due To Osmosis. This Happens Because More Water Molecules From Outside Enter The Cell Than Leaving It. As A Result, The Cell Swells Up. Unicellular Organisms Living In Fresh Water And Most Plant Cells Absorb Water Through Osmosis.
  • Roots Also Absorb Water Through Osmosis. This Happens Because The Air Spaces In Root Hair Contain Cell Sap Which Has High Concentration Of Salt And Less

Activity-5

To Study Osmosis With The Help Of Dried Raisins Or Apricots

You Will Need

Dried Raisins Or Apricots, Concentrated Sugar Or Salt
Solution, Wrater And Petri Dish

Procedure

Take Few Dried Raisins Or Apricots And Place Them In Plain Water.
leave Them For A Few Hours.

Observation 1

You Will Observe That Each Raisin Or Apricot Absorbs Water And Swells When Placed In Pure Water.

Now, Place These Raisins Or Apricots In Concentrated Sugar Or Salt Solution For Some Rime.
What Do You Observe?

Observation 2

You Twill Observe That The Raisins Or Apricots Lose Water And Then Shrink.

Concentration Of Water Than Outside. As A Result, Water Enters The Root Cell Through Osmosis.

Free Notes For KSEEB Class 9 Chapter 1 Fundamental Unit Of Life 

Cell Wall

  • In Addition To Plasma Membrane, Plant Cells Arc Surrounded By A Cell Wall Also. Cell Wall Is An Outer, Rigid, Protective And Supportive Covering Of Plant Cells. ‘Ihe Cell Wall Lies Outside The Plasma Membrane. Its Thickness Varies In Different Types Of Cells. The Cell Wall In Plant Cell Is Mainly Composed Of Cellulose. Cellulose Is A Complex Substance And Provides Mechanical And Structural Strength To Plants. Cell Wall Is Also Present In Fungi And Bacteria But Not In Animal Cell

Functions

  • It Provides A Definite Shape To The Cell
  • It Protects Plasma Membrane And Internal Structures From The Attack Of Pathogens And Mechanical Injury.
  • It Counteracts The Osmotic Pressure.
  • It Provides Rigidity To The Cell.
  • A Living Plant Cell Can Lose Water Through Osmosis And As A Result There Is A Shrinkage Or Contraction Of Die Cell Contents Away From The Cell Wall. This Phenomenon Is Known As Plasmolysis. Let Us Perform The Following Activity To Learn More About Plasmolysis.

Activity-6

  • To Show With The Help Of Rlioeo Leaf That Only Living Cells Undergo Plasmolysis
    You Will Need
  • Rhoeo Leaf, Glass Slides, Concentrated Sugar Or Salt Solution, Wrater, Petri Dish And Microscope
  • Procedure
  • Take A Rhoeo Leaf And Break It To Take Out A Peel.
    Mount This Peel Of Rhoeo Leaf In Water And Examine Under High Power Of Microscope. What Do You Observe?Observation 1
  • You Will Observe Ihai The Leal’ Peel Contains Green Coloured Granules Called Chloroplnsts. The Chloroplasts Contain Chlorophyll, Which Helps In Photosynthesis.
    Now, Put A Drop Of Strong Or Concentrated Solution Of Sugar Or Salt On The Leaf Peel. Wait For A Minute And Observe. What Do You Sec?
  • Observation 2
  • You Will Observe That Plasmolysis Has Occurred And The Green Leaf Peel Cells Lose Water And Shrink Tire Cell Contents Away From The Cell Wall. This Is Because Water Leaves The Cells Through Osmosis.
    Now, Place The Leaf Peel In Boiling Water For A Few Minutes. This Will Kill The Cells.
    Mount This Peel Of Boiled Rhoeo Leaf In Water And Examine Under High Power Of Microscope.
    Put A Drop Of Strong Or Concentrated Solution Of Sugar Or Salt Solution On The Leaf Peel. Wait For A Minute And Observe. What Do You See? Did Plasmolysis Occur This Time?

Observation 3

  • You Will Observe That The Boiled Leaf Peel Did Not Show Plasmolysis. As The Plasma Membrane Is Dead, The Water Molecules Move Freely In And Out Of The Cell. This Shows That Only Living Cells Show Plasmolysis And Not The Dead Cells.

Plasmolysis

  • Shrinkage Of The Protoplast (Cell Content) Of A Cell From Its Cell Wall Under The Influence Of A Hypertonic Solution Is Called Plasmolysis. If We Place A Living Turgid Cell In A Hypertonic Solution, Withdrawal Of Water (Exosmosis) Occurs From The Central Vacuole Of The Cell As A Result, Die Size Of The Protoplasm Becomes Reduced And The Plasma Membrane Is Withdrawn From The Cell Wall.
  • Cells Of Plants Absorb So Much Water But Do Not Burst. Why?
  • Did You Know That The Cells Of Plants, Fungi And Bacteria Can Withstand Very Dilute (Hypotonic) External Media Widiout Bursting? Hus Is Because Of Cell Wall. In Hypotonic Media, Cells Take Up Water Due To Osmosis. As A Result, The Cell Swells Building Up Pressure Against The Cell Wall. At The Same Time, Cell Wall Also Exerts Equal
    Pressure Against The 3wou.Cn Cell Contents. Because Of
    The Pressure Exerted By The Cell Wall, The Cells Of Plants, Fungi And Bacreria Can Withstand Much Greater Changes In The Surrounding Medium Than The Animal Cells.

Fundamental-unit-of-life-Diagrametic-reprasentation-of-plasmolysis-in-cell

Nucleus

  • A Dense, Generally Round (Spherical) But Sometimes Cylindrical Nucleus Is Present Almost At The Centre Of A Cell. The Nucleus Contains:
  • Nuclear Envelope Or Nuclear Membrane,
  • Nucleoplasm Or Nuclear Sap,
  • Chromosomes (Chromatin Network), And Nucleolus
  • Nuclear Envelope: It Is A Double-Membraned Structure, And Contains A Large Number Of Pores. It Separates The Nucleus From The Cytoplasm. The Nuclear Pores Control The
  • Transfer Of Substances From Inside The Nucleus To Outside, I.E. To Cytoplasm.
  • Nucleoplasm: Inside Die Nuclear Envelope Is Die Nucleoplasm. It Is Transparent, Semi-Fluid And Contains A Large Number Of Enzymes Which Are Required For The Syndvesis And Functioning Of Dna, Rna, Etc.
  • Chromatin Network: In The Nucleus, Chromatin Network And Nucleolus Are Present. Chromatin Network (Gk. Chroma-Colour) Is A Tangled Fibrous Mass Of Thread-Like Structures.
  • The Chromatin Threads
  • Organize To Form Chromosomes Which Are Visible Only At The Time When The Cell Divides. Each Chromosome Consists Of Two Similar Threads Or Rod-Shaped Structures.
  • Chromosomes Are Composed Of Dna (Deoxyribonucleic Acid) Molecules And Proteins. The Information For Inheritance Of Characteristics From Parents To The Next Generation
  • Passes In The Form Of Dna. Dna Also Contains The Information For Cell Construction And Organization. Functional Segments Of Dna Are Called Genes. Genes Are The Carriers Of Heredity.
  • Nucleolus: It Is A Dense, Round Structure Attached To A Chromatin Fibre At A Specific Region. The Nucleolus May Be One Or More In Number And Is Not Bound By Any Membrane. It Is Rich In Protein And Rna (Ribonucleic Acid) Molecules.

Fundamental-unit-of-life- Nucleus

KSEEB SSLC Biology Fundamental Unit of Life Chapter 1 Revision Notes 

Functions

  • The Nucleus Controls Cell Metabolism And Other Activities Of The Cell, Hence, It Is Also Called Master Or Director Of The Cell.
  • Chromatin Part Of The Nucleus Possesses All The Genetic Information That Is Required For The Growth And Development Of The Organism, Along With Its Reproduction, Metabolism And Behaviour.
  • : Nucleus Plays A Central Role In Cellular Reproduction (Division Of Single Cell To Form Two Cells).
  • Along With Controlling The Cell Environment, Nucleus Also Directs The Chemical Activities Of The Cell. This Determines The Development And Future Form Of The Cell.

Cytoplasm

  • The Space Between The Plasma Membrane And The 20 Nucleus Is Filled By A Homogeneous, Translucent,
    Colloidal Liquid Called Cytoplasm. It Consists Of Various Inorganic And Organic Molecules, Such As Water, Salts, Proteins And A Variety Of Enzymes.
    Cytoplasm Also Contains Various Cell Organelles. These Cell Organelles Are Enclosed By Membranes. We Have Already Discussed That The Membrane-Bound Cell Organelles Are Present In Eukaryotes While They Are Absent In Prokaryotes

Functions

  • The Cytoplasm Helps In The Intracellular (Within The Cell) Distribution Of Molecules, Enzymes And Nutrients.
  • It Helps In The Exchange Of Materials Between Different Cell Organelles.
  • Biosynthesis Of Nucleotides, Proteins And Fart)’ Acids Takes Place In The Cytoplasm.
    Breaking Down Of Glucose Takes Place In The Cytoplasm.

Protoplasm

  • Protoplasm Is The Living Component Of The Cell Containing Cytoplasm And The Nucleus In A Living Cell The Chemical Composition Of Protoplasm Varies From One Cell To Another.
  • The Common Elements Found In Protoplasm Are Carbon, Hydrogen, Oxygen, Nitrogen, Iron, Phosphorus, Sulphur, Etc. Which Constitute Carbohydrates, Proteins, Fats, Minerals And Water. All The Living Components Of A Cell Lie In The Protoplasm And Perform Their Functions.

Cell Organelles

Each Cell Is Surrounded By A Cell Membrane. Cell Membrane Keeps The Contents Of The Cell Separate Front The External Environment. In Addition, Many Chemical Activities Take Place Continuously In Each Cell These Chemical Activities Are Required To Support The Complicated Structure And Functions Of Multicellular Organisms. Thus, To Perforin These Activities, The Cells Have Many Organelles That Float In The Cytoplasm. Some Organelles Are Membranous And Some Are Non- Membranous. Membranous Organelle Is A Characteristic
Feature Of Eukaryotes Only. Some Of These Organelles Are So Small That They Can Be Seen Only Under An Electron Microscope. Cell Organelles Carry Out Some Very Crucial Functions In Cells. The Different Cell Organelles That Are Found In The Cytoplasm Of The Cell Are Given

Endoplasmic Reticulum (Er)

  • Endoplasmic Reticulum (Also Known As Er) Is An Interconnected Network Of Membrane-Lined Tubes And Sheets That Run Through The Cytoplasm. Ar Some Places It Is Connected With The Plasmalemma (Plasma Membrane) As Well As With Tire Nuclear Envelope. It Looks Like Round Or Oblong Bags Or Long Tubules. Endoplasmic Reticulum Is Similar In Structure To The Plasma Membrane. The Endoplasmic Reticulum Always Forms A Network System.
  • Endoplasmic Reticulum Is Mainly Of Two Types – Smooth Er And Rough Er.
  • Rough Endoplasmic Reticulum (Rer) Has A Rough Membrane Because A Number Of Ribosomes Are Found Attached To Its Outer

Fundamental-unit-of-life- rough-endoplasmic-reticulum

Fundamental-unit-of-life- cell-organelles

Surface. Ribosomes Are Present In All Active Cells. Ribosomes Are The Site For Protein Synthesis. Endoplasmic Reticulum Sends These Proteins To Different Sites In The Cell As Per Requirement. Rough Endoplasmic Reticulum Is Very Well-Developed In Plasma Cells, Fibroblasts, Goblet Cells, Etc.

Smooth Endoplasmic Reticulum (Ser) Does Not Have Any Ribosomes. This Type Of Endoplasmic Reticulum Is Found In Liver Cells, Interstitial Cells, Adipose Cells, Muscle Cells, Etc. It Helps In The Manufacture Of Fat Molecules And Lipids. Lipids Together With Some Proteins Help In The Building Up Of Cell Membrane Through A Process Known As Membrane Biogenesis. Many Other Proteins And Lipids Function As Enzymes And Hormones.

Class 9 KSEEB Biology Chapter 1 Cell Structure And Function Notes 

Functions

  • Endoplasmic Reticulum Divides The Cytoplasm Into Small Compartments. It Gives Rigidity To The Cell, Thus, Acts As A Skeletal Framework Of The Cell.
  • It Serves As A Channel And Helps In Transporting Different Materials Such As Proteins Between Various Regions Of The Cytoplasm As Well As Between The Cytoplasm And The Nucleus. As It Helps In Intracellular Transport, It Is Also Known As The Circulatory System Of The Cell.
  • It Acts As A Cytoplasmic Framework And Provides A Large Surface Area Inside The Cells For Various Biochemical Activities.
    The Membranes Of Endoplasmic Reticulum Contain A Number Of Enzymes For Various Metabolic Activities.
  • In The Liver Cells Of Vertebrates, Smooth Endoplasmic Reticulum Helps In The Detoxification Of Many Poisons And Drugs.

Golgi Apparatus

Golgi Apparatus Was First Described By Camillo Golgi. It Is Present In All Eukaryotic Cells (Except Rbcs). Golgi Apparatus Consists Of A System Of Membrane- Bound Vesicles Which Are Arranged Somewhat Parallel To Each Other In Stacks Called Cisterns. These Membrane- Bound Vesicles Often Connect To The Membranes Of Endoplasmic Reticulum Forming Another Portion Of A 22 Complex Cellular Membrane System.

Fundamental-unit-of-life- goigi-apparatus

 

  • There Arc Three Distinct Components Visible In The Golgi Apparatus, Flattened Sacs Or Cistemae, Clusters Of Tubules And Vesicles, And Large Vesicles Or Vacuoles.
  • In Plant Cells, Golgi Apparatus Also Consists Of Many Freely Scattered Sub Units Called Dictyosomes.

Functions

  • Golgi Apparatus Helps In The Secretion Of Mucus, Enzymes And Hormones. The Material Synthesized Near The Endoplasmic Reticulum Is Transported To Various Targets Inside
  • And Outside The Cell Duough The Golgi Apparatus.
  • It Helps In The Storage, Modification And Packaging Of Secretory Products In Die Vesicles.
  • In Some Cases, Golgi Apparatus Also Helps In The Manufacture Of Complex Sugars From Simple Sugars. The Golgi Apparatus Also Helps In Die Formation Oflysosomes.

Ribosomes

Ribosomes Are Found In All Cells, Both Prokaryotes And Eukaryotes, Except In Mature Sperms And Rbcs. In Prokaryotic Cells, They Arc Found Floating Freely In

Fundamental-unit-of-life-ribosomesPNG

The Cytoplasm. In Eukaryotic Cells, They Occur Freely In The Cytoplasm As Well As Are Attached To The Outer Surface Of The Rough Endoplasmic Reticulum. They Are Also Found In The Mitochondria And Plastids.

Functions

Ribosomes Help In Protein Synthesis Inside The Cell Hence, They Arc Called Protein Factories Of The Cell.

Fundamental Unit Of Life KSEEB Chapter 1 Summary For Class 9 

Lysosomes

  • Lysosomes Are Membrane-Bound Sacs Filled With Digestive Enzymes. Ihese Enzymes Are Made By Rough Endoplasmic Reticulum. Lysosomes Have A Resistant Covering Membrane That Protects The Cell From The Digestive Enzymes Contained Inside Them.
  • Lysosomes Help In Waste Disposal From The Cell. Lysosomes Digest Any Foreign Material As Well As Worn- Out Cell Organelles, And Hence, Keep The Cell Free From Any Unwanted Waste Material. Whenever Any Foreign Material (Such As Bacteria) Enters The Cell, The Lysosomes Break Them Up Into Small Pieces. This Is Because The Enzymes Released By The Lysosomes Are Very Powerful And Help In The Process Of Digestion Of These Foreign Particles, Hi Case The Cell Gets Damaged, Lysosomes Burst And Release The Enzymes, Which Digest Their Own Cell. Hence, They Are Called Suicide Bags Of The Cell.

Functions

  • Lysosomes Help In Intracellular Digestion.
  • They Provide Energy During Starvation By Controlled Breakdown Of Stored Food.
  • Lysosomes Bring About Cellular Breakdown And Are Associated With Ageing.

Mitochondria – The Powerhouse Of The Cell
(Gk. Mitos: Thread, Chondrion: Granule)

Typically, The Mitochondria Are Sausage-Shaped Cell Organelles Covered By A Double-Membrane Envelope. The Outer Membrane Is Smooth And Porous, While The Inner Membrane Is Folded Into Structure Known As Cristae. These Folds Create A Large Surface Area For The Generation Of Atp (Adenosine Triphosphate) During Respiration. Mitochondria Release Energy In The Form Of Atp Molecules. This Energy Is Required For Performing Various Activities. Hence, Mitochondria Are Also Known As The Powerhouses Of Tire Cell Atp Is Known As The Energy Currency Of The Cell. Our Body Uses Energy Stored In Atp For Manufacturing New Chemical Compounds And For Mechanical Work.
The Cavity Of The Mitochondria Is Filled With Lipids, Proteins, Circular Dna And Ribosomes. Thus, Mitochondria Can Make Some Of Their Own Proteins.

Functions

Mitochondria Are Miniature Biochemical Factories Where Food Is Oxidized And Energy Is Released. This Energy Is Stored In The Form Of Atp. Hence, Mitochondria Are Called The Powerhouses Of The Cell.Fundamental-unit-of-life- mitochondriaThey Provide Important Intermediates For The Synthesis Of Several Biochemical Substances Like Chlorophyll, Cytochromes And Steroids.
Synthesis Of Many Amino Acids Occurs In Mitochondria.

Mitochondria Can Manufacture Some Of Their Own Proteins.
Plastids – Kitchen Of The Cell

Plastids Are Cell Organelles Found Only In A Plant Cell. Structurally, Plastids Contain Many Membrane Layers Embedded In A Material Called The Stroma. Like The Mitochondria, Plastids Also Have Their Own Dna And Ribosomes.
There Are Three Types Of Plastids – Chromo plasts (Coloured Plastids), Chloroplasts And Leucoplasts (White Or Colour less Plastids).
Chromo plasts (Gk. Chroma: Colour, Plasto: Formed) They Contain Fat Soluble Yellow, Orange Or Red Coloured Pigment. They Provide Colour To Flowers And Fruits. Chromoplasts Arc Formed Either From Leucoplasts Or Chloroplasts.

Chloroplasts (Gk. Chloros: Green,Plasto: Formed) They Are Green Plastids. Inside, Each Chloroplast Lias A Colourless Ground Matrix, Stroma And

Fundamental-unit-of-life- sub-micro-scopic-structure-of-the-chloroplast

A Membranous System, Grana. Each Granum Has Membrane-Bound Sacs Called Thylakoids. Thylakoids Of Chloroplasts Possess Photosynthctic Green Pigment, I.E. Chlorophyll. They Also Contain Various Yellow Or Orange Pigments In Addition To Chlorophyll.

Leucoplasts (Gk. Leukos: White, Plasto: Formed) These Are Colourless Plastids And Are Named On The Basis Of The Substances They Store. They Store Starch, Oils And Protein Granules.

Functions

  • Chromoplasts Arc Coloured Plastids That Provide Colour To The Flowers And Fruits.
  • Chloroplasts, The Green Plastids, Help In Photosynthesis And Thus, Help In The Synthesis Of
  • Food. These Are Called Kitchen Of The Cell.
  • Leucoplasts Help In The Storage Of Food.

Vacuoles

  • These Are Fluid-Tilled Membrane-Bound Spaces. Vacuoles Arc Storage Sacs For Liquid Or Solid Contents. They Are Bound By A Membrane Known As Tonoplast
  • In Animal Cells, Vacuoles Are Small. In Mature Plant Cells, The Small Vacuoles Fuse To Form A Single Large Central Vacuole. Hie Central Vacuole Of Some Plant Cells May Occupy 50-90% Of The Cell Volume.
  • In Plant Cells, Vacuoles Are Full Of Cell Sap And Provide Turgidity And Rigidity To The Cell. The Cell Sap Consists Of Tree Water And A Variety Ot Compounds In Solution Or Suspension. The Compounds Include Amino Adds, Minerals, Sugars, Organic Adds And Some Proteins.
  • In Singlc-Ccllcd Organisms Such As Amoeba, The Vacuoles Are Modified As Food Vacuoles. The Food Vacuole Contains Food Items That Amoeba Iras Consumed. In Some Other Unicellular Organisms, Like Paramecium, These Vacuoles Are Spedalized To Expel Excess Water And Some Wastes From The Cell.

Functions

  • Vacuoles Help The Plant Cells To Remain Turgid.
  • They Play An Important Role In Growth By Helping In The Elongation Of Cells.

difference-between-animal-cell-plant-cell

 

  • They Provide An Aqueous Environment For Die Accumulation And Storage Of Water-Soluble Compounds (Sugars, Minerals, Pigments, Etc.).
  • In Protozoans Like Amoeba And Paramecium, Vacuoles Help In Digestion And Excretion.

Centrosome

Centrosome Is A Small, Naked Protoplasmic Structure Present Near The Nucleus. It Is Present Only In Animal Cells. Centrosome Consists Of Two Small Granules Called Centrioles, Which Lie At Right Angles To Each Other. During Cell Division, Centrioles Migrate To Die Opposite Poles Of The Cell.

Functions

  • They Help In Spindle Formation During Cell Division. They Act As Basal Bodies And Give Rise To Cilia And Flagella.
  • Differences Between An Animal Cell And A Plant Cell
  • The Differences Between An Animal Cell And A Plant Cell Are Given

Cell Division

  • All New Cells Arise From Pre-Existing Cells By The Process Of Cell Division. New Cells Are Required For Growth, Replacement Of Old And Worn Out Cells And To Form Gametes During Reproduction. Cell Division Is Primarily Of Two Kinds Mitosis And Meiosis.

Mitosis

  • Mitosis Or Mitotic Cell Division Is An Equational Division In Which One Parent Cell Divides To Form Two Daughter Cells. The Daughter Cells Are Identical To Each Other And Also To The Parent Cell In Every Respect.
  • In Mitosis, The Same Normal Chromosome Number Of The Parent Cell Is Maintained At Each Stage Of Mitotic Division Of The Cell.

Meiosis

  • Meiosis Takes Place In The Reproductive Cells That Produce Gametes, Sperms And Ova. Meiosis Is A Modified Mitosis In Which Chromosomes Divide Once And The Nucleus Divides Twice. As A Result Of Which The Number Of Chromosomes Is Reduced To Half. Hence Meiosis Is A Reductional Division.

 

Fundamental-unit-of-life-different-stages-of-meiosis-in-animal-cell

Fundamental-unit-of-life-different-stages-of-meiosis-in-an-animal-cell

Summary

  • A cell is the structural and functional unit of life.
  • The cell was discovered by Robert Hooke in 1665 while he was studying a thin slice of cork under a self-built microscope.
  • The cell theory was formulated by two biologists, MJ Schlelden (1838) and T Schwann (1839).
  • On the basis of nuclear organization, cells are of two types – prokaryotic cells and eukaryotic cells.
  • A cell is enclosed by a plasma membrane which is made up of lipids and proteins. Plasma membrane is a living membrane. It is selectively permeable and allows only selected substances to pass through it.
  • In plant cells, a cell wall is also present. It is mainly composed of cellulose and is located outside the cell membrane. Cell wall provides a definite shape to the cell. It protects plasma membrane and internal structures from pathogens and mechanical injury.
  • In eukaryotes, the nucleus is separated from the cytoplasm by a double-layered membrane. It controls all metabolic and other activities of the cell. Hence, it is called the master of the cell.
  • Endoplasmic reticulum helps in intracellular transport. Hence, it is known as the circulatory system of the cell. It helps in the synthesis and transport of proteins and fats.
  • Ribosomes help in protein synthesis inside the cell. Hence, they are called protein factories of the cell.
  • Golgi apparatus consists of a system of membrane-bound vesicles which are arranged somewhat parallel to each other in stacks called cisterns.
  • Golgi apparatus helps in the storage, modification and packaging of substances manufactured in cell.
  • Mitochondria are miniature biochemical factories, where food is oxidized and energy is released. The energy is stored in the form of ATP. Plastids are cell organelles found only in plant cells.
  • Plastids are of three types – chromoplasts, chloroplasts and leucoplasts. Chloroplasts help in photosynthesis, and thus in the synthesis of food. These are called kitchen of the cell. Lysosomes help in Intracellular digestion. They also bring about cellular breakdown, and hence are called suicide bags of the cell.
  • In animal cells, vacuoles are usually absent. If present, they are small and scattered. But in mature plant cells, usually a single large central vacuole is present. It helps in maintaining the turgidity of the cell and stores important substances including waste.

Part A – Our PASTS – III (History)

Part B – Resources and Development (Geography)

Part C: Social and Political Life -III (Civics)

KSEEB Class 9 SSLC Biology Chapter 3 Diversity in Living Organisms Notes

KSEEB Class 9 SSLC Biology Chapter 3 Diversity In Living Organisms Learning Objectives

  • After completing this chapter, you will be able to: establish a relationship between classification and evolution
  • recognize the hierarchy in classification of groups
  • understand the Importance of binomial nomenclature over common names of plants and animals
  • classify living world into five kingdoms and give theirrharartArierire;
  • classify kingdom Plantae Into various divisions; classify kingdom Animalia into phyla and give characteristics and examples of each phylum; classify phylum Chordata Into classes, giving their characteristic features and examples.

Have You Ever Visited A Zoo?

  •  In a zoo, you find variety of animals. Similarly, if you look in a garden or a park, you will find several types of plants – some with flowers, some without flowers, some shrubs, some large trees and so on. If you compare yourself with, a monkey, you will find several differences as well as many similarities too. Did you know that there are about 10 million species of organisms on earth? However, only one-third of them have been identified so for.
  • There are different life forms on the earth ranging from microscopic bacteria to gigantic blue whale of length 30 metres and redwood tree of California of 100 metre height. There is variety in lifespan as well as form and colour of organisms. If we attempt to study such a vast variety of organisms, it will be convenient if we group them and give each of them a biological name.
  • In this chapter, you will study about diversity in the living world, classify living world into five kingdoms and establish a relationship between classification and evolution.

Biodiversity

What Is Biodiversity?

Biodiversity means the diversity of life forms or occurrence of different living organisms and their variety in a particular region. The term biodiversity was coined by Walter G. Rosen in 1985.

Class 9 KSEEB Biology Chapter 3 Diversity in Living Organisms Study Material 

KSEEB Class 9 SSLC Biology Chapter 3 Diversity in Living Organisms Notes

Does biodiversity remain unchanged over a period of time?

  • Since in any given area many different life forms live together and share tire environment and its resources, they arc affected by each other also. During this process of co-existence, a stable community of different species is formed.
  • In recent times, the balance of community with environment has also largely changed due to human involvement The diversity in such communities is affected by characteristics of land, water, climate, etc. Changes in the genetic make-up also bring about morphological changes leading to biodiversity.

What are the regions of rich biodiversity?

  • The tropical regions ranging between the Tropic of Cancer and the Tropic of Capricorn are rich in diversity of microorganisms, plant and animal life.
  • This is because of the warm and humid climate in the tropical region. This region is also called the region of mega diversity. Only a few countries contain more than half the biodiversity available on earth.
  • These are Brazil, Colombia, Peru, Ecuador, Mexico, Zaire, Madagascar, Australia, China, India, Indonesia and Malaysia.

What is Classification

  • Classification means identifying similarities and differences between different kinds of organisms and then placing these groups in an order of close relationship.
  • In other words, biological classification attempts to group living organisms according to how closely related these organisms are. This is called phylogenetic system of classification.In the eighteenth century Carolus Linnaeus considered as ‘Father of Taxonomy’ developed a way of naming and classifying organisms.
  • The study of the kinds and diversity of organisms and the evolutionary relationships among them is known as systematic.? (Gfc. systema – system, ikos – body of facts) or taxonomy (Gfc. taxis – arrangement, L. nominalis – belonging to a genome). These studies result in the description of new species and the organization of animals into groups based on evolutionary relationships.
  • To understand classification in a simple way, let us take one example. Suppose you are given a basket full of different kinds of fruits, and you are asked to separate them on the basis of their similarity and morphological appearance. Then you will place oranges with oranges, grapes with grapes, apples with apples and so on.

Diversity-in-Living-Organisms-a-simple-diageam-to-show-classification.

What is the Basis of Classification?

  • Since time immemorial, attempts have been made to classify living things into groups. Aristotle classified animals according to very simple way by just looking at life as to whether they lived on land, in water or in air. However, this categorization did not provide an exact basis of classification as there were differences among animals living in water, on land or in air. For example, in water you find many lands of fish, corals, octopus, etc. All of them live in water, yet they are very different from each other.
  • Thus, it is necessary to first identify characteristics on the basis of which the broadest division can be made. Then, this is followed by the next set of characteristics for making sub-groups within these broader divisions. In this way, each time a new characteristic can be taken to further classify each group.

What do we mean by characteristic?

  • A characteristic Is a particular form or function exhibited by organisms. For example, five fingers in each hand in humans is a characteristic. Plants do not contain fingers and thus are different from humans.
  • There are some characteristics which are broader and widely found. On the other hand, there are some characteristics that arc at microscopic level. The broader characteristic is followed by limiting characteristics or small characteristics.
  • The characteristic at the next level would be dependent on the previous characteristic and would decide the variety in the next level.
  • This way a hierarchy of mutually related characteristics, to be used for classification, is built.

Some examples of characteristics used for a hierarchical classification are

  • Presence or absence of membrane-bound organelles: All eukaryotic cells have membrane- bound organelles such as nucleus and mitochondria. The membrane bound organelles allow cellular processes to be carried out efficiently in isolation from each other. In organisms that do not have dearly demarcated nucleus and other organelles, biochemical pathways take place in a very different way. This would have an effect on ever)’ aspect of cell structure. Thus, presence or absence of membrane- bound organelles will act as a basic characteristic in classification of different organisms.
  • Occurrence of cells singly or in groups: This is another characteristic that is taken into consideration while classifying living beings. Do cells live singly (unicellular) or in groups (multicellular) and does each group live as an individual group? Some cells such as Amoeba live singly, while some cells group together to form an individual. Cells that group together to form a single organism use the principle of division of labour.
  • In such cases, all the cells forming an individual would not be similar. Instead, group of cells would cany out specialized functions. This would result in a very basic distinction in the body design of organisms. As a result, you find many differences in the body structure of single-celled organisms such as Amoeba and multicellular organisms such as worms and humans.
  • Mode of food procurement: What is the mode of procurement of food? Whether organisms produce their own food through photosynthesis (autotrophs) or depend on food manufactured by others (heterotrophs)?
  • What is the level of organization in the photosynthetic organisms (plants)?
  • In animals, how does an individual’s body develop and organize its various parts. What is the specialization in organs to perform different functions?
  • In all of the above questions, a hierarchy is developing. Tims, the characteristics of body structure used for classifying plants will be different from those used for classifying animals as the basic structures of plants and animals arc different These structural features are then further used to make sub-groups, rather than making broad groups.

KSEEB Biology Chapter 3 Diversity In Living Organisms solved Questions

Diversity in Living Organisms Importance of classification

  • A wide variety of organisms on the earth can be easily studied by classification.
  • Classification gives a summary of all life forms at a glance.
  • It helps us understand the relationship between different groups of organisms and helps in understanding their evolutionary history.
  • It serves as a base for the development of other biological sciences such as ecology and behavioural sciences, biogeography and evolution.
  • It helps in understanding the characteristics of whole group of organisms by studying only a few representatives from that group.
  • It helps us in the identification and classification of different organisms such as agricultural pests, pathogens and components of an ecosystem on which various fields of applied sciences such as agriculture, public health and environmental biology depend.

Diversity in Living Organisms Classification And Evolution

  • In the previous section, you have studied that all living things are identified and categorized on the basis of some characteristics such as their body structure in form and function, mode of nutrition etc.
  • Out of many characteristics, some characteristics are dominant and are likely to produce wide-ranging changes in body structure than others. Time also plays an important role in this. Some characteristics appear earlier in the body structure while other characteristics appear late. Thus, those characteristics which came into existence earlier arc likely to be more basic and fundamental than characteristics that came into existence later. So, we can say that once a certain body structure has come into existence, it will be the basis for other changes in the body structure that happen subsequently. Thus, the classification of life forms will be closely related to their evolution.
  • However, one question arises here as to what is evolution?
  • Evolution is the process of gradual change or development in different kinds of living organism. Most life forms that exist today have arisen by an accumulation of changes in body structure over a period of time. This has allowed an organism to possess them for his/her better survival. It was Charles Darwin who for the first time described this idea of evolution in 1859 in his book, The Origin of Species.
  • This idea of evolution can be linked to classification. According to Darwin, there are some organisms with primitive body structure that have not changed much over a period of time. These are called older or primitive or lower organisms, which arc simple. On the other hand, there are other groups of organisms that have acquired their peculiar body structure quite recently. They have a complex body structure. They may be considered as the younger or advanced or higher organisms. Since the complexity in body structure is likely to increase over a period of time, we may say that older organisms are simpler, while younger organisms arc more complex and have evolved from the simpler organisms.

KSEEB SSLC Chapter 3 Diversity In Living Organisms Key Points For Class 9 

The Hierarchy In Classification Of Groups

Each, organism is classified on the basis of its evolutionary relationship with other groups of organisms. Biologists such as Ernst Haeckel (1894), Robert Whittaker (1959), and Carl Woese (1977) tried to classify all living organisms into broad categories. These broad categories are called kingdoms.

Kingdoms – Two Or five ?

  • The largest group of organisms recognized by biologists is the kingdom. But how many kingdoms should be there? Earlier, there were only two kingdoms of classification, namely plants and animals. This, however, caused problems in classifying fungi, bacteria and single-celled organisms, which do not fit into either kingdom – plant or animal.
  • R H Whittaker in 1969, suggested the five kingdom classification on the basis of cell structure i.e. presence or absence of a nucleus, body organisation (unicellular or multicellular) and mode of nutrition. The five kingdoms that are recognized by Whittaker are -Monera, Proto ctista (Protista), Fungi, Plantae and Animalia. Later another Biologist, Woese, introduced modification by dividing Monera into Archacbactcria (or Archaea) and Enbacteria (or bacteria).
  • further classification is done by naming sub-groups at various levels in the following scheme

Diversity-in-Living-Organisms-hierarchy-of-classification.

  • By grouping organisms on the basis of hierarchy of characteristics into smaller groups, one can arrive at the basic unit of classificatiou which is species.

Species

  • The lowermost category is the species. Each organism is classified into a particular species. It is the basic unit of classification.
  • Members of a species interbreed to produce fertile offsprings, which can perpetuate.
  • Apart from small variations, members of a species arc almost identical in their anatomy, physiology and behaviour.
  • Members of a species often resemble each other very closely in appearance (but are not exactly similar). For example, tigers belong to species tigris, humans belong to species sapiens. Thus, the scientific name for tigers is Panthera tigris and for humans is Homo sapiens.

Genus

  • Closely-related species are grouped into a genus (plural genera). Thus, genus is a group of species which have common external resemblance. For example, lion (Panthera leo), leopard (Panthera pardus) and tiger (Panthera tigris) are three different species but belong to one genus Panthera.

Family

  • Groups of similar genera are grouped together into a family. For example, cat (Felis domestica) and tiger (Panthera tigris) belong to the same family, Felidae.

Order

  • Similar families are grouped together into orders. For example, humans and apes arc grouped together into the same order, Primates. Git (Felidae) and dog (Canidae) are grouped together into the same order, Carnivora.

Class

  • Similar orders arc grouped into classes. For example, we belong to the class Mammalia along with other orders like Carnivora that includes tiger, dog and cat.

Phylum

  • Closely-related classes arc grouped into phylum. For example, classes like mammals, fish, amphibians, reptiles and birds all belong to the phylum Chordata.

Kingdom

  • Similar phyla constitute a kingdom. For example, all animals belong to kingdom Animalia and all plants belong to kingdom Plantae.

KSEEB Class 9 Biology Chapter 3 Diversity In Living Organisms Explained 

Nomenclature-Scientific Naming of Organisms Activity 1

  • To study the common names of some animals and plants in different languages
  • Look for the names of some common animals and plants. Find out the common names of these in different languages.

 

Diversity-in-Living-Organisms-activity-1.

  • From the above activity, we can conclude diat different animals and plants have different names. A cat is called billi in Hindi, biral in Bengali and punai in Tamil. There are different names of a cat in Arabic, Russian and French.
  • Thus, a need was felt to assign a particular organism with an internationally acceptable name in the same manner as the chemical symbols and formulae of various substances are used throughout the world. Thus, a simplified system of naming organisms called Binomial nomenclature was proposed by Carl Linnaeus (1707 1778).
  • Binomial nomenclature means a two-name system of naming organisms. The scientific name of an organism is thus unique and can be used to identify it anywhere in the world.
  • Under Binomial system of nomenclature, each organism lias a scientific name consisting of two parts. The first part is genus and the second part is the species. For example, the scientific name of mango is Mcmgifera indica, scientific name of house fty is Musca domestica and scientific name of the common Indian frog is Rana tigrina

Mainly, the following rules arc applied to scientific names:

The name of the genus comes first and its first letter is always capitalized. The name of the species comes second and starts with a small letter. For example, the binomial name for humans is Homo sapiens. In this, Homo is the genus, starting with a capital letter while sapiens is the species starting with a small letter

  • The scientific name is printed in italics or underlined (separately for genus and species name) if handwritten. For example, Homo sapiens or
  • Scientific names are mostly in Latin and are accepted all over the world.

Nomenclature-Scientific Naming of Organisms Activity 2

  • To study the scientific names of some common plants and animals
  • Given below is a table giving common names of some plants and animals. Find out the scientific names of these and write them down

Diversity-in-Living-Organisms-activity-2.

Diversity-in-Living-Organisms-activity-2.-1

Five Kingdoms

Kingdom Monera

(Gk. monos: single)

  • The organisms belonging to kingdom Monera are the oldest, simplest and prokaryotic microorganisms. They have following characteristics:
  • These are prokaryotes. They do not have a defined nucleus or organelles.

Diversity-in-Living-Organisms-bacteria-and-blue-green-alge-kingdom-monera.

  • They are unicellular, but may be present in the form of colonies or filaments of independent cells.
  • Some of them have cell walls while others do not have (for example Mycoplasma).
  • Their mode of nutrition is mainly autotropluc (i.e. synthesizing their own food, for example some bacteria and blue-green algae) or sometimes heterotrophic (i.e. getting it from the environment by absorption, for example Mycoplasma).
  • They are usually non-motile, but some may have flagella and gliding movements. Cilia arc absent.
  • – Their reproduction is primarily asexual (by fission).
  • Examples: Bacteria (E. coliVibrio cholerat etc.), blue-green algae or cyanobacteria (Anabama, Nostoc etc.) and Mycoplasma.

Kingdom Protista

(Gk. Protista: first)

The organisms belonging to kingdom Protista include unicellular eukaryotic organisms. Primarily, they are aquatic and occur in oceans, lakes, ponds and damp soils.

Diversity-in-Living-Organisms-some-examples-of-protists

They have the following characteristics:

  • They are first eukaryotes, having a well-defined nucleus and complex membranous organelles. They are unicellular or colonial forms without distinct division of labour.
  • Some have cellulose wall and chloroplast and their mode of nutrition is autotrophic (algae). Some do not have cell wall and chloroplast and are heterotrophic (Protozoans),
  • They have hair-like cilia (Paramecium) or whip- likc flagella (Euglena) or pscudopodia (Amoeba) for moving around.
  • Examples: Unicellular algae, diatoms, protozoans (Paramecium, Amoeba, Euglena), etc.

Class 9 SSLC Biology Chapter 3 Notes With Diagrams 

Kingdom Fungi

  • The organisms belonging to kingdom Fungi include heterotrophic (without chlorophyll) eukaryotic organisms living as parasites or saprophytes.

 

Diversity-in-Living-Organisms-some-examples-of-fungi

  • They have a definite cell wall made up of tough complex sugar called chitin.
  • They grow in dark and moist habitat and use dead organic matter as food. Hence, they are called saprophytes.
  • Many of them have the capacity to become multicellular organisms at certain stages in their lives except yeast which is a unicellular fungus.

Diversity-in-Living-Organisms-the-five-kingdom-classification.

  • They arc usually non-motilc.
  • They reproduce mostly by spore formation. However, sexual reproduction may also take place. Examples: yeast, mushrooms, etc.
  • Some fungi live in mutual relationship with algae or blue- green algae (cyanobacteria). Such a relationship is called symbiotic relationship. These symbiotic forms are called lichens that are usually found growing on the bark of trees.

Kingdom Plantae

  • Kingdom Plantae includes all organisms that arc truly multicellular eukaryotes with cell walls. All plants are included in this kingdom. Die plantae are distinguished by the following characteristics:
  • They are multicellular eukaryotic organisms adapted to carry out photosynthesis. Hence, they are autotrophic.
  • They perform photosynthesis with the help of chlorophyll present in cliloroplasts.
  • They have a cell wall made up of true cellulose, enclosing cytoplasm with large vacuole.
  • They are non-motile, without definite shape or size.
  • We will stud)r about kingdom Plantae in later sections of this chapter.

Kingdom Animalia

  • Kingdom Animalia includes all those organisms which are multicellular eukaryotes without cell walls. They are heterotrophs as they caimot synthesize their own food. We will study about kingdom Animalia in later sections of this chapter.

Kingdom Plantae (Plant Kingdom)

  • All plants arc multicellular, photosynthetic and contain chloroplast in their cells. Most of the plants are adapted for living on land.
  • Plants can be classified at three levels.
  • Level one: Whether plant body is well- differentiated and has distinct components.
  • Level two: Whether the differentiated plant body has special tissues for the transport of wrater and other substances within it  Level three: Whether plants are able to bear seeds and whether the seeds are enclosed within the fruits.
  • The plant kingdom includes algae, mosses, liverworts, ferns, conifers and flowering plants.

Sub-KingdomCryptogamae

(Gk. crypto: hidden, gamous: marriage)

  • The plants belonging to sub-kingdom Cryptogamae are also known as lowrer group of plants, flow’erless or seedless plants. ’Ihesc plants do not bear external flowers or seeds and hence are considered to have hidden reproductive organs. The sub-kingdom cryptogamae is further divided into three divisions, namely, Thallophyta, Bryophyta and Pteridophyta.

Division Thallophyta

(Gk. Txatlus: undifferentiated, phyton: plant)

Characteristics of division Thallophyta

  • The plant body is not differentiated into roots, stems and leaves. It is in the form of an undivided mass of cells called thallus.

Diversity-in-Living-Organisms-classification-of-plants.

  • Vascular system is absent, o These plants are predominantly aquatic.
  • The thallophytcs mainly include algae.
  • Examples: Spirogyra, Chora, Cladophora, Ulothrix, Ulva, etc.

Division Bryophyta

(Gk. Bryotu moss, phyton: plant)

The bryophytes are amphibians of the plant kingdom. The bryophytes include mosses and liverworts. They usually range from 2 cm to 15 cm in length. They are unable to grow tall because they do not have xylem to support them, nor do they have a vascular system for transport of materials. They do not have true roots.

Diversity-in-Living-Organisms-some-examples-of-fthallophytes-algae

Characteristic features of division Bryophyta

  • These are simplest land plants with no true roots. The body of the plants is simple, flat and usually differentiated into stems and leaf-like structures.
  • They do not have specialized tissues for conduction of water and other substances horn one part of the plant to another. This means that bryophytes do not have conducting or vascular tissues,xylem and phloem. Thus, they are called noil-vascular cryptogamic plants.
  • The plants develop a number of hair-like structures at their lower ends. These are known as rhizoids. Rhizoids help in fixing the plant to the soil and absorbing nutrients.
  • Tire)’ haw chlorophyll and thus can manufacture their own food tlirough photosynthesis.
  • ‘ Bryophytes show alternation of generations, i.e. they possess two types of generations – gametophyte and sporophyte.
  • These plants mainly live in damp, shady places.

Diversity-in-Living-Organisms-some-examples-of-bryophytes

  • Examples: Ricciti, Mafchantia (liverwort), Funaria (moss), etc.

Division Pteridophyta

(Gk. Pteroti: feather, phyton: plant)

  • The term ‘pteridophyta is derived from the Greek word pteron meaning feather. This is because pteridophytes have fcathcr-likc or pinnate fronds. Pteridophytes are seedless vascular plants that have sporophytic plant body. They are also called vascular cryptogams as they possess well-developed conducting system, i.e. vascular elements such as xylem and phloem. They grow well in shady areas like forests, mountain slopes and hills, especially in the tropical rain forests.

Class 9 SSLC Biology Chapter 3 Notes With Diagrams

Characteristic features of division Pteridophyta

  • The body of pteridophytes is differentiated into true stem, leaves and roots like higher plants.
  • They possess well-developed vascular tissues – xylem and phloem – for conduction of water and other substances from one part of plant body to another.
  • Tire most conspicuous of pteridophytes are the ferns. They arc seedless vascular plants of humid tropical and temperate areas.
  • Examples: Ferns (Nephrolepis), horse-tails (Equisetum), club mosses (Selaginella) and Marsilea. The major differences between Bryophyta and Pteridophyta.

Diversity-in-Living-Organisms-some-examples-of-pteridophyta

Diversity-in-Living-Organisms-differences-between-bryophytes-pteridophyta

Sub-Kingdom Phanerogamae

(Gk. Phaneros: visible, gamos: marriage)

  • The plants belonging to sub-kingdom Phanerogamae arc 9ccd bearing plants. The body of these plants i3
  • differentiated into true roots, stem and leaves. ‘Ihe vascular system composed of xylem and phloem is well- developed. The reproductive organs are multicellular seeds and an embryo develops from a fertilized egg. The major differences between Cryptogamae and Phanerogamae are given.
  • Sub-kingdom Phanerogamae is further sub-divided on the basis of presence or absence of fruits (Le. whether the seeds are naked or enclosed in fruits) into two sub-divisions – Gyranospenoae and Angiospcrmae.

Sub-division Gymnospermae

  • The term gymnosperm is derived from two Greek words – gyntno meaning naked and sperma meaning seed. Thus, gymnosperms are plants with naked seeds. They are found mostly in cold areas where snowfall occurs too often. All gymnosperms are perennial woody plants. Some of these live for thousands of years.

Characteristics of Gymnospermae

  • The plants are differentiated into roots, stem and leaves.
  • The stem is erect. It may be branched a.3 in Pinus or unbranched as in Cycas.
  • Gymnosperms are a small group of seed plants. Seeds do not occur inside a fruit. They are naked or lie exposed on the surface of megasporophylls. o The seed contains a food-laden tissue called endosperm for the future growth of embryo.
  • Examples: Cycas, Pinus, Ginkgo, Araucaria, Gnetum etc.

Diversity-in-Living-Organisms-conifers-and-cycas-gymnospermae.

Diversity-in-Living-Organisms-differences-between-cryptogamae-phanerogamae

Diversity-in-Living-Organisms-differences-between-gymnogamae-angiospermae

Sub-division Angiospermae

  • The term angiosperm is derived from two Greek words – angio meaning covered and spertna meaning seed. Thus, angiosperms are plants with seeds covered by tire fruit ‘Die major differences between Gymnospermae and Angiospermae are given
  • On die basis of number of corylcdons, angiosperms are divided into two groups – monocotyledonous or monocots (seeds with a single cotyledon) and dicotyledonous or dicots (seeds with two cotyledons). The major differences between monocots and dicots are given .

Free Notes For KSEEB Class 9 Chapter 3 Diversity In Living Organisms

Characteristics of Angiospermae

  • These are flowering plants the seeds of which are enclosed in a fruit.
  • The seeds contain cotyledons called seed leaves as in many cases they emerge and become green when the seed germinates. Thus, cotyledons represent pre-designed plant in the seed.
  • After fertilization, ovary develops into a fruit.
  • Xylem contains vessels and phloem contains companion cells.
  • Examples; Pea, gram, maize, oats, rice, Hibiscus, Paphiopedilum, Ipomoen, mango, etc.

Diversity-in-Living-Organisms-some-examples-of-angiosperms

Diversity-in-Living-Organisms-differences-between-monocots-dicots

Activity-3

To study dicot and monocot seeds and plants Yon will need Seeds and plants of green gram, wheat, maize, peas, tamarind and water

Procedure

Take some seeds of green gram, wheat, peas, maize and tamarind. Soak them in water for one day till they become tender.

Try to split each seed into two halves. Do all of them split into nearly two halves?

Observation 1

  • ‘The seeds that split into rwo halves are dicot seeds and die seeds that do not split are monocor seeds.
  • Now take the plants of these and observe their roots, leaves and flowers.
  • What is the root system – tap roots or fibrous roots?
  • What is the type of venation – parallel or rericulate?
  • How many petals are there in the flowers of these plants?

Carefully observe the above-mentioned characteristics and note them down in a table in your workbook.

Observation 2

You will observe that the wheat and oiaize plants (monocot) have fibrous root system, parallel venation and three or multiple of three petals.

On the other hand, dicot plants like green gram, peas and tamarind have tap root system, reticulate venation and five or multiple of five petals.

Diversity-in-Living-Organisms-activity-3.

Kingdom Animalia

Let us discuss the various characteristic features of

kingdom Animalia before classifying them.

Characteristic features of kingdom Animalia

  • These are multicellular organisms.
  • These arc eukaryotic organisms, that is, the cells do not contain cell wall, but contain only cell membrane and membrane-bound organelles (like nucleus).
  • They are heterotrophs.
  • They are mostly mobile.
  • They show increased sensitivity through the nervous system.
Let us now study about the phyla included in kingdom animals

Major Phyla Of Kingdom Animalia

Based on die extent and type of body structure differentiation, the kingdom Animalia is divided into two groups, namely, Invertebrate (non-chordata) and Chordata. A broad division of kingdom Animalia is given in

Phylum Porifera – organisms with pores

‘Ihe word porifera means organisms with pores or holes all over their body. Phylum Porifera includes sponges. Porifera are multicellular organisms with cellular level of body organisation.

KSEEB Class 9 Diversity In Living Organisms Chapter 3 Notes With Examples

Characteristics of Phylum Porifera

  • These are non-motile organisms fixed to the solid surface. They are commonly called sponges and found in marine habitats, i.c. oceans.
  • The body has many pores (ostia) or holes. These pores form canal system. Water flows through canals and brings food and oxygen with it. It is then passed outside through osculum, a large aperture present at the upper end of the body.
  • Body encloses a large cavity called spougococl.
  • Body is covered with a hard outer skeleton.
  • The body of sponges has minimal cellular differentiation and almost no tissue organization. That means that though sponges arc multicellular organisms, their cells are not organized to form tissues.
  • They are mostly sessile. No organs, movable parts or appendages are present.
  • The sponges reproduce asexually by budding and gcnunulc formation and sexually tlirough fertilization. They have great regenerating capacity. Examples: Sycott, Euplectella, Easpongia, Spongilla, Leucosolaua, etc.

Diversity-in-Living-Organisms-kingdom-animalia

 

Diversity-in-Living-Organisms-classification-of-animals

Phylum Coelenterata (Cnidaria)

  • The phylum Coelenterata includes Hydra, jelly fish, sea anemones and corals. Coelenterates are multicellular organisms which have tissue level ot organization. Their body consists of two layers of tissues (ectoderm and endoderm) with a jelly-like substance in between.
  • The coelenterates mostly live in fresh water, in solitary or colonial forms. Some like Hydra may be seen with naked eyes and can be found attached to stones or aquatic plants.

Characteristics of Phylum Coelenterata

  • The body has no head and no segmentation. The body shows tissue level of organization.
  • These animals have two germ layers, namely, ectoderm and endoderm; one layer makes up the cells on the outer side of the body (epidermis)

Diversity-in-Living-Organisms-some-spong-belong-to-phylum-porifera

  • and other layer makes the inner lining of the body (gastrodermis). There is a jelly-like substance in between.
  • The mouth is surrounded by a ring of tentacles. Tentacles contain nematocysts (stinging cells) called cnidoblasts.
  • The body has a gut cavity (called coelenteron) with a single opening for food and waste material.

Diversity-in-Living-Organisms-some-examples-of-phylum-cndaria

  • Some of the species of coclcntcrates live in colonics (such as corals), while some live a solitary life (such as Hydra).
  • Reproduction may be asexual!)’ or sexually.
  • Examples: Hydra, Obelia, sea anemone (Metridiutu), Aurelia (Jelly fish), etc.
  • The major differences between Porifera and Coelenterata (Cnidaria) are given in Table 3.5.
  • Hydra. a coelenterate, has great regenerating power. If it is cut into several fragments, each fragment will grow into a new Hydra.

Phylum Platyhelminthes – the flatworms

(Gk. Platy: flat; helminth: worm)

  • The Platyhelminthes are flatworms. Flatworms live in moist places. The body of platyhelminthes has complex body organization in comparison to poriferans and coclcntcrates.
  • They range from a few millimetres to a few centimetres in size.

Characteristics of Phylum Platyhelminthes

  • Their bodies are dorsoventraUy flattened. That is why, they are called flatworms.
  • The body is bilaterally symmetrical with the left and right sides of the body having the same design.
  • They are triploblastic animals (body made of three germ layers – ectoderm, mesoderm and endoderm from which tissues can be formed). This allows formation of outer and inner bodylinings and some organs.
  • They possess a mouth but no anus.
  • There is some degree of tissue f ormation. However, there is no true coelom or internal body cavity, in which well-developed organs can be accommodated (housed).

Diversity-in-Living-Organisms-some-examples-of-phylum-platyhelminthes

Diversity-in-Living-Organisms-differences-between-porifera-and-coelenterata

  • They arc either free-living (such as planarians) living in water and soil or parasitic (such as liver flukes) living inside the body of other organisms. They have suckers or hooks or both for attachment to the body of the host.
  • Reproduction takes place mostly sexually, but few reproduce asexually too. They are mostly hermaphrodite (both sex organs in the same body). Examples: Tapeworm, liver fluke (Fasciola hepatica), Planaria, etc.

Phylum Nematoda (or Nemathelminthes)- Parasitic worms or roundworms

(Gk. Nema: thread; helminth: worm)

  • The organisms belonging to this phylum are also known as Aschelminthes. They are mostly parasites having slender, elongated bodies tapering at each end.

KSEEB SSLC Biology Chapter 3 revision Notes For Diversity In Living Organisms

Characteristics of Phylum Nematoda

  • They are triploblastic animals (body wall having three germ layers).
  • The body is bilaterally symmetrical and unsegmented, and is cylindrical (rather than flattened).
  • The body has tissue level of organization. However, no real organs are present.
  • The body cavity is a pseudocoelom, i.e. no true coelom is present
  • The organisms are mostly parasites having slender, elongated bodies tapering at each end.
  • They are parasitic worms that cause diseases such as elephantiasis (caused by filarial worms) and intestinal disorder (caused by roundworms or pinworms). Ascaris lumbricoides is a common roundworm living in the intestine of humans.
  • They have a definite digestive system that runs along the length of their body. They have a mouth, pharynx, intestine and anus. Sexes are separate, males are smaller than females.

Diversity-in-Living-Organisms-ascaris-and-wuchereria-belong-to-phylum-nemathelminthes

  • Examples: Ascaris(roundworm),Enterobius (pinworm), Wuchereria (filarial worm)etc.
  • The major differences between Platyhclminthes and Nemathelminthes are given.

Phylum Annelida – the ringed worms

(Gk. annulus: ring; idos: form)

  • Organisms belonging to phylum Annelida arc worms with body appearing as if made up of a series of rings. It includes earthworms, ragworms (Nereis) and leeches. They arc first animals with true coelom.

Characteristics of Phylum Annelida

  • The are elongated, segmented, worm-like animals.
  • Body is triploblastic and contains true coelom. This allows true organs to be packaged in the body.

Diversity-in-Living-Organisms-some-examples-of-phylum-annelida

Diversity-in-Living-Organisms-differences-between-plathelminthes-and-nemathelminthes

  • The body is bilaterally symmetrical.
  • The have organ level of organization, i.e. extensive organ differentiation.
  • They have a well developed brain, ventral nerve cord, dorsal and ventral blood vessels.
  • The body is provided with setae or parapodia for locomotion.
  • Their body is mctamcrically segmented (made up of a series of similar segments). Each segment is lined up one after the other from head to tail, and possesses a similar pattern of organs, such as nerves, blood vessels and excretory organs.
  • They are found in diverse habitats ranging from freshwater, marine water to land.
  • Examples: Pheretima (earthworm), leech, Nereis (sandworm), Aphrodila (sea mouse), etc.

Phylum Arthropoda – organisms with jointed appendages

(Gk. Arthro: jointed; pod: legs)

  • Organisms belonging to phylum Arthropoda have jointed appendages (legs and antennae).
  • This is the largest invertebrate phylum. Insects, centipedes, millipedes and spiders arc the common organisms belonging to phylum Arthropoda.

Characteristic features of Phylum Arthropoda

  • The body is bilaterally symmetrical and segmented.
  • They are triploblastic animals.
  • The body (coelomic) cavity is reduced and filled with blood, thus called haemocoel. There is an open blood circulatory system and the blood docs not flow in well-defined blood vessels.

Diversity-in-Living-Organisms-some-examples-of-phylum-arthropodaPNG

  • The body is segmented into two regions – cephalothorax (head and thorax together) and abdomen, or three regions – head, thorax and abdomen.
  • They have jointed appendages (legs).
  • They possess a hard exoskeleton made of chitin.
  • Examples: Crab, butterfly, dragonfly, housefly, prawn, scorpion, spider, etc.

The major differences between Annelida and Arthropoda are given

Diversity-in-Living-Organisms-differences-between-annelida-and-arthropodaPNG

Phylum Mollusca

  • The organisms belonging to phylum Mollusca have an outer shell and soft body. The fold of skin around the body is called mantle which secretes the outer shell. They have muscular foot which is used for movement.
  • Phylum Mollusca includes slugs, snails and octopus.

Characteristics of Phylum Mollusca

  • These are triploblastic animals with a coelom- The coelomic cavity is reduced.
  • The body is bilaterally symmetrical.
  • They live in terrestrial or aquatic habitat
  • The body is unsegmented or with little segmentation.
  • The body is soft, often protected by a hard calcareous shell.
  • They have a muscular foot on their ventral surface for moving around.
  • They have an open circulatory system.
  • They have kidney-like organs for excretion. Examples: Snail, Chiton, Pila, Utiio, octopus, etc

Diversity-in-Living-Organisms-some-examples-of-phylum-mollusca

Diversity-in-Living-Organisms-some-examples-of-phylum-echinodermata

 

Phylum Echinodermata – organisms with spiny skin

  • The word Echinodermata has come from Greek words echinos meaning spiny and derma meaning skin. Thus, they are organisms with spiny skin.
  • Characteristics of Phylum Echinodermata
  • They are triploblastic coelomate animals.
  • They are exclusively free-living marine animals living in sand at the bottom of the sea.
  • Their body is unsegmented. There is no head and body surface lias five radial anns (pentamerous symmetry).
  • They move by tube feet The body cavity has water-vascular system.
  • They possess calcareous exoskeleton made up of calcium carbonate with spiny skin all over the body.
  • They have a water driven tube system that they use for locomotion.
  • Examples: Asterias (starfish), Echinus (sea urchin), Holothuria (sea cucumber), Antedon (feather star), etc

Class 9 KSEEB Biology Chapter 3 Taxonomy And Classification Notes

Sub-Phylum Protochordata

The word Protochordates means primitive chordates. They possess notochord at some stage of their life. Notochord (chord means string) is a stiff rod-like structure that runs along the back of the animal and separates nervous tissue from the gut It also provides a place for muscle attachment for easy movement.

Diversity-in-Living-Organisms-some-examples-of-sub-phylum-protochordata

Characteristics of Sub-Phylum Protochordata

  • They are triploblastic animals with a coelom.
  • The notochord may not be present in all stages in their lives. It does not run along the entire length of die animal body.
  • They are marine animals.
  • Examples: Batanogfossus, Herdmania, Amphioxus.

Phylum Chordata

(Sub-Phylum Vertebrata)

The vertebrates are triploblastic, coelomate animals with bilaterally symmetrical body. They include the fish, amphibians, reptiles, birds and mammals. Vertebrates have a true vertebral column and internal skeleton, which allows a different distribution of muscle attachment points for movement of the body parts. They have complex differentiation of body tissues and organs. The major differences between Nonchordata and Chordata are given in Table 3.8.

Characteristics of chordates

  • Presence of notochord: In some stages of their life, all chordates possess a stiff rod-like structure (called notochord) running along the body, close to die dorsal surface.
  • Dorsal tubular nerve cord: They have a dorsal, hollow, tubular nerve cord close to the notochord.
  • They are triploblastic animals with diree germ Layers.
  • They have paired gill pouches in some stages of their life.
  • They are true coelomate animals.
  • Vertebrates are fiirther grouped into five classes.

Group Pisces (fish)

The group called Pisces contains many classes. They are all exclusively water living (aquatic) animals. Some well-known examples are cartilaginous fish (entirely cartilaginous endoskeleton), such as sharks and bony fish (bony and cartilaginous endoskeleton) such as tuna or rohu. The cartilaginous fish belong to Class Chondrichthycs, and the bony Osh belong to Class Osteichthyes. These are the two classes under the Pisces group.

Characteristics of Group Pisces

  • They have a cartilaginous skeleton or bony skeleton.
  • They live exclusively in water. The body is streamlined, which allows easy movement in water. They possess fins and muscular tail for locomotion.
  • They possess gill slits for water to move inside die body for respiration. Pour to seven pairs of gills are present. They obtain oxygen dissolved in water with die help of gills.
  • Eyes are without eyelids. They possess nostrils that help in olfaction.

 

Diversity-in-Living-Organisms-differences-between-nonchordata-and-chordata

 

Diversity-in-Living-Organisms-some-examples-of-pisces

 

  • The body is covered with overlapping dermal scales. The)1 are cold-blooded animals (i.e. their body temperature changes with the change in the outside temperature).
  • The heart is two-chambered, unlike four-chambered heart in mammals.
  • They lay eggs.
  • Examples: Mandarin fish, angler fish, lion fish, rohu, sea horse, climbing perch, liilsa, mullet, electric ray, stingray, dog fish, etc.

Diversity-in-Living-Organisms-some-examples-of-class-amphibia

 

Class Amphibia

(Gk.Ainphi: double or both; bios: life)

The amphibians have evolved from fish. Thus, they are adapted to partly live on land, and partly in water. They differ from fish as they do not possess scales. They have three-chambered heart and mucous glands in die skin.

Characteristic features of Class Amphibia

They live partly in water and partly on land. Larval stage has a tail and live in water Adults may live in water as well as on land.

Diversity-in-Living-Organisms-external-features-of-frog.

Diversity-in-Living-Organisms-differences-between-amphibians-and-reptiles

  • They have smooth skin. It is covered by mucus, which keeps the skin moist and slippery.
  • They have two pairs of limbs. Digits do not have claws.
  • Respiration takes place either duough gills or lungs.  Heart is thrce-chambercd.
  • Most amphibians lay their eggs in water, where they develop into tadpoles. The tadpoles after metamorphosis become adults and can live in water as well as on land.
  • Examples: Toad, frog, salamander, tree frog, etc

Class Reptilia (Gk. Repere: to crawl)

They are the cold-blooded animals with their body covered with horny epidermal scales. The animals belonging to Class Reptilia can live solely on land and are very less dependent on water. They lay eggs covered with waterproof shells, so they need not lay eggs in water, like amphibians. Their skin is waterproof and covered with protective homy scales.

Characteristics of Class Reptilia

  • They are cold-blooded animals.
  • Their body has a head, neck, trunk and a tail.
  • Their body is dry and covered with homy, scaly epidermal skin.
  • The)- have two pairs of limbs on their trunk.
  • They have lungs tor breathing and respiration.
  • Most of them have three-chambered heart (four-chambered in crocodiles).
  • They lay eggs covered with waterproof shells, so they need not lay eggs in water like amphibians. Examples: Wall lizards, snakes, turtle, flying lizard,chameleon, crocodiles, etc.

Summary Of KSEEB Biology Chapter 3 Diversity In Living Organisms For Class 9

Class Aves (Gk. Avis: bird)

Birds evolved from reptiles and have many similarities with them. Birds are easily distinguished because their bodies are covered with feathers. All birds are warm¬blooded and have four-chambered heart.

Diversity-in-Living-Organisms-some-examples-of-class-reptailsPNG

Characteristics of Class Aves

  • They have feathers and scales covering their bodies.
  • They are warm-blooded animals (Le. their body temperature does not change with outside temperature).
  • o The body is divisible into three parts – head, neck and trunk.
  • Their forelirabs are modified to form wings tor flight.
  • Heart is four-chambered.
  • Their jaw has a homy beak- Teeth are absent.
  • They have lungs for respiration.
  • They lay eggs.
  • Examples; Pigeon (Columba livia), house sparrow, crow, white stork, penguin, male tufted duck, etc.

 

Diversity-in-Living-Organisms-some-examples-of-aves

Class Mammalia

(Gk. Mamma: breast)

  • All mammals possess mammary glands that are more developed in females than in males to suckle their young ones. Like birds, mammals are also warm¬blooded animals. Mammals have body covered with hair.
  • All female mammals secrete milk on which their young ones feed.

Characteristics of Class Mammalia

  • They possess mammary (milk) glands. They secrete milk to feed their young ones.
  • Their body is covered with hair. Sweat and oil glands arc also present in the skin.
  • The body is divided into head, neck, trunk and tail. Tail is absent in some mammals. They have four limbs.
  • Except two mammals,the platypus and the echidna(spiny ant-eater) which lay eggs,all other mammals give birth to young ones.Kangaroos give birth to very poorly developed young ones.
  • Sexes arc separate – male and female.Their young ones usually develop inside the uterus of die mother.
  • Heart is four-chambered.
  • They are warm-blooded animals.
  • Examples: Rat (Rattus rattus), human, tiger, elephant, cat, whale, bat, etc.

Diversity-in-Living-Organisms-some-examples-of-mammals

 

Diversity-in-Living-Organisms-differences-between-aves-and-mammals

Summary

  • Classification means grouping organisms on the basis of their similarities and dissimilarities.
  • The scientific naming of organisms is according to the Linnaeus system of Binomial Nomenclature.
  • As per modern Whittaker system of classification, there are five kingdoms of living organisms namely, Monera,Protista, Fungi, Plantae and Animalia.
  • Monerans do not have a defined nucleus or cell organelles, nor do they show multicellular body structure.
  • Protists include unicellular eukaryotic organisms such as algae, diatoms and protozoans.
  • Organisms belonging to kingdom fungi are heterotrophic eukaryotic organisms which use decaying organic matter as food material.
  • Yeast and mushrooms are Included in kingdom fungi.
  • All multicellular eukaryotes, which are photosynthetic autotrophs, are grouped under kingdom Plantae.
  • Kingdom Plantae is classified into two sub-kingdoms – Cryptogamae and Phanerogamae.
  • Thallophyta are plants that have undifferentiated body.
  • Bryophyta are amphibians of plant kingdom.
  • Pteridophyte are vascular plants that do not produce seeds.
  • Gymnosperms are plants that bear naked seeds.
  • Angiosperms are plants that bear seeds enclosed inside fruits.
  • Angiosperms are divided into two classes depending upon the number of cotyledons in their seeds monocotyledons and dicotyledons.

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