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Biology Question Papers

12th Standard Biology English Medium Zoology - Immunology 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Tabulate the types of Innate immunity and explain the mechanism involved.

  • 2)

    Explain the role of thymus as an lymphoid organ.

  • 3)

    Write a note on different types of antigen antibody reactions.

  • 4)

    Describe the structure of HIV with a diagram.

12th Standard Biology English Medium Zoology - Immunology 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What are the cells involved innate immune system?

  • 2)

    Why is opsonisation efficient in phagocytosis?

  • 3)

    What is vaccine? What are its types?

  • 4)

    A person is infected by HIV. How will you diagnose for AIDS?

  • 5)

    Autoimmunity is a misdirected immune response. Justify.

12th Standard Biology English Medium Zoology - Immunology 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Mention the types of acquired immunity and write two differences between them.

  • 2)

    Differentiate between primary and secondary Immune response.

  • 3)

    Differentiate primary and secondary lymphoid organs with an example.

  • 4)

    What is bursa of fabricius?

  • 5)

    Write a.note an spleen as a lymphoid organ.

12th Standard Biology English Medium Zoology - Immunology 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Differentiate between:
    Innate immunity and acquired immunity

  • 2)

    Differentiate between:
    Primary and secondary immune responses

  • 3)

    Differentiate between:
    Active and passive immunity

  • 4)

    Differentiate between:
    Humoral and CMI immunity

  • 5)

    Differentiate between:
    Autoimmune disease and Immunodeficiency disease

12th Standard Biology English Medium Zoology - Immunology 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Define immunity.

  • 2)

    Define innate immunity.

  • 3)

    Define acquired immunity.

  • 4)

    Describe the location of the thymus gland.

  • 5)

    What is MALT and BALT?

12th Standard Biology English Medium Zoology - Immunology 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role.

  • 2)

    How does saliva act inbody defence?

  • 3)

    How does immune system work?

  • 4)

    Name and explain the type of barriers which involve macrophages.

  • 5)

    What are interferons? Mention their role.

12th Standard Biology English Medium Zoology - Immunology 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Lysozyme is an example of _______

  • 2)

    ______ is not a feature of acquired immunity.

  • 3)

    Passive immunity does not exhibit this characteristic.

  • 4)

    ______ is not a secondary lymphoid organ.

  • 5)

    This statement about the thymus which is not true.

12th Standard Biology English Medium Zoology - Immunology 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Colostrum provides

  • 2)

    Paratope is an

  • 3)

    Allergy involves

  • 4)

    Anaphylactic shock is due to

  • 5)

    Spread of cancerous cells to distant sites is termed as

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write the botanical name, origin, cultivational area and uses of Black gram.
    Botanical name : Vigna mungo

  • 2)

    Give a detailed account on anyone fibe yielding plant.

  • 3)

    Draw a table mentioning binominals, family name, useful part and their medical uses of any five local medicinal plants

  • 4)

    Explain the stepwise preparation of Bio-pest repellent from the leaves of Azadirachta indica

  • 5)

    What are the uses of rubber?

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write the origin and area of cultivation of green gram and red gram.

  • 2)

    What is TSM? How does it classified and what does it focuses on?

  • 3)

    Give an account on the role of Jasminum and Rosa in perfuming

  • 4)

    Write the economic importance of rice.

  • 5)

    What are psychoactive drugs? Add a note Marijuana and Opium

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write a short note on foxtail millet.

  • 2)

    Give a botanical name of green gram and write its  origin andarea of cultivation and uses.

  • 3)

    Mention the ways in which mangoes are used in Indian culinary.

  • 4)

    Write a note on origin and area of cultivation of cotton.

  • 5)

    What is vulcanization? Who invented it?

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Discuss which wood is better for making furniture.

  • 2)

    A person got irritation while applying chemical dye. What would be your suggestion for alternative?

  • 3)

    Which is called as the “King of Bitters”? Mention their medicinal importance.

  • 4)

    Differentiate bio-medicines and botanical medicines.

  • 5)

    What are millets? What are its types? Give example for each type.

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Give the binomials of paddy and wheat.

  • 2)

    What is maida? Mention its culinary purpose.

  • 3)

    Name any four millet varieties.

  • 4)

    Ragi rich food helps to overcome bone related ailments - justify.

  • 5)

    Eating millets is good for diabetic patients. How?

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write the cosmetic uses of Aloe.

  • 2)

    What is pseudo cereal? Give an example.

  • 3)

    Name the humors that are responsible for the health of human beings.

  • 4)

    Give definitions for organic farming?

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Paddy, Wheat and Sorghum, etc., comes under the category of cereals. All the members ofcereals belong to which of the following family?

  • 2)

    Match the common names of the given plant species with their respective binomial

    (A) Paddy (I) Vigna radiata
    (B) Lady's finger  (II) Titicum aestivum
    (C) Wheat  (III) Oryza sativa
    (D) Green gram (IV) Abelmoschus esculentus
  • 3)

    Identify the tamil name for flaked rice

  • 4)

    Pigeon pea is the common name for _______

  • 5)

    Statement 1: Arachis hypogea belongs to Fabaceae
    Statement 2: It is a native of Brazil.

12th Standard Biology English Medium Botany - Economically Useful Plants and Entrepreneurial Botany 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Consider the following statements and choose the right option.
    i) Cereals are members of grass family.
    ii) Most of the food grains come from monocotyledon.

  • 2)

    Assertion: Vegetables are important part of healthy eating.
    Reason: Vegetables are succulent structures of plants with pleasant aroma and flavours.

  • 3)

    Groundnut is native of _____________

  • 4)

    Statement A: Coffee contains caffeine
    Statement B: Drinking coffee enhances cancer

  • 5)

    Tectona grandis is coming under family

12th Standard Biology English Medium Botany - Plant Breeding 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Give a comparative account on Seaweed liquid fertilizer.

  • 2)

    Explain the steps involved in hybridization.

  • 3)

    What are the changes in a plant due to domestication?

  • 4)

    Why should we choose Plant Breeding techniques?

  • 5)

    How was green revolution originated in India?

12th Standard Biology English Medium Botany - Plant Breeding 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What are the different types of hybridization?

  • 2)

    Write a note on heterosis.

  • 3)

    List out the new breeding techniques involved in developing new traits in plant breeding.

12th Standard Biology English Medium Botany - Plant Breeding 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    In 1926, Vavilov initially proposed eight main geographic centres of crop origin. Mention any six of them.

  • 2)

    Name any three eminent plant breeders of Indian origin.

  • 3)

    How Rhizobium acts as an efficient bio- fertiIizer?

  • 4)

    Azolla increases the yield of paddy crop - support your answer.

  • 5)

    Mention any three advantages of Arbuscular mycorrhizal association.

12th Standard Biology English Medium Botany - Plant Breeding 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is meant by domestication of plants?

  • 2)

    Mention any two free-living nitrogen-fixing bacteria.

  • 3)

    What are bio-pesticides? Why they are considered better than synthetic pesticides?

  • 4)

    Name any four plants used in Green leaf manuring

  • 5)

    What is plant breeding?

12th Standard Biology English Medium Botany - Plant Breeding 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Differentiate primary introduction from secondary introduction.

  • 2)

    How are microbial innoculants used to increase the soil fertility?

  • 3)

    Explain the best suited type followed by plant breeders at present?

12th Standard Biology English Medium Botany - Plant Breeding 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    ________is the process of bringing a plant species under human control.

  • 2)

    Which of the following scientist developed world's first cotton hybrid?

  • 3)

    Identify the incorrect statement:

  • 4)

    Which is not a free-living nitrogen-fixing species?

  • 5)

    Arbuscular mycorrhizae is a symbiotic association between ____________

12th Standard Biology English Medium Botany - Plant Breeding 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Assertion: Genetic variation provides the raw material for selection
    Reason: Genetic variations are differences in genotypes of the individuals.

  • 2)

    While studying the history of domestication of various cultivated plants _______ were recognized earlier

  • 3)

    Pick out the odd pair

  • 4)

    Match Column I with Column II

    Column I Column II
    i) William S. Gaud I) Heterosis
    ii) Shull II) Mutation breeding
    iii) Cotton Mather III) Green revolution
    iv) Muller and Stadler IV) Natural hybridization
  • 5)

    The quickest method of plant breeding is

12th Standard Biology English Medium Botany - Environmental Issues 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    List out the major effects of Ozone Depletion.

  • 2)

    What are the objectives of Afforestation programme?

  • 3)

    How Eichhornia crassiper spoils the Indian ecosystem?

  • 4)

    Write a comparative note on Carbon Foot Print (CFP).

  • 5)

    Explain a) green house effect and b) global warming.

12th Standard Biology English Medium Botany - Environmental Issues 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Suggest a solution to water crisis and explain its advantages.

  • 2)

    Explain afforestation with case studies.

  • 3)

    What are the effects of deforestation and benefits of agroforesty?

12th Standard Biology English Medium Botany - Environmental Issues 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    List out the effects of global warming.

  • 2)

    Mention any three sources of carbon dioxide emission.

  • 3)

    What are the adverse effects of global warming on plants?

  • 4)

    Suggest few ways to overcome global warming.

  • 5)

    Ozone acts as a natural sunscreen - Justify.

12th Standard Biology English Medium Botany - Environmental Issues 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    How do sacred groves help in the conservation of biodiversity?

  • 2)

    Which one gas is most abundant out of the four commonest greenhouse gases? Discuss the effect of this gas on the growth of plants?

12th Standard Biology English Medium Botany - Environmental Issues 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Define Greenhouse gases and list out its examples

  • 2)

    Name any four greenhouse gases.

  • 3)

    Define global warming.

  • 4)

    Methane is one of a potent green house gas. Point out a few sources from where methane is generated.

  • 5)

    List out the anthropogenic sources of Nitrous oxide.

12th Standard Biology English Medium Botany - Environmental Issues 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is ozone hole?

  • 2)

    Give four examples of plants cultivated in commercial agroforestry.

  • 3)

    Expand CCS.

  • 4)

    How do forests help in maintaining the climate?

12th Standard Biology English Medium Botany - Environmental Issues 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    ___________ is not a method of waste water treatment.

  • 2)

    Which is not a greenhouse gas?

  • 3)

    Identify the incorrect statement with regard to Global warming

  • 4)

    The total ozone layer over the earth surface is ____________________

  • 5)

    Methane is ________________ times as effective as CO2 at trapping heat.

12th Standard Biology English Medium Botany - Environmental Issues 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Which of the following would most likely help to slow down the greenhouse effect.

  • 2)

    With respect to Eichhornia
    Statement A: It drains off oxygen from water and is seen growing in standing water.
    Statement B: It is an indigenous species of our country.

  • 3)

    Find the wrongly matched pair.

  • 4)

    Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

  • 5)

    One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as

12th Standard Biology English Medium Botany - Ecosystem 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Describe the various stages of decomposition process.

  • 2)

    Give a detailed account of Biotic and abiotic components of a pond ecosystem.

  • 3)

    Write a note on the strategies of ecosystem management.

  • 4)

    List out the characteristics of ecological succession.

  • 5)

    Differentiate Primary succession and Secondary succession.

12th Standard Biology English Medium Botany - Ecosystem 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Generally in summer the forest are affected by natural fire. Over a period of time it recovers itself by the process of successions .Find out the types of succession and explain.

  • 2)

    Draw a pyramid from following details and explain in brief.
    Quantities of organisms are given-Hawks - 50, plants - 1000.rabbit and mouse - 250 + 250, pythons and lizard - 100 + 50 respectively.

  • 3)

    Various stages of succession are given bellow. From that rearrange them accordingly. Find out the type of succession and explain in detail. Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage, forest stage, submerged free floating stage, marsh medow stage.

12th Standard Biology English Medium Botany - Ecosystem 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is secondary productivity? Explain its types.

  • 2)

    List the factors affecting primary productivity.

  • 3)

    Explain the concept of trophic level in an ecosystem.

  • 4)

    State the second law ofthermodynamics.

  • 5)

    Explain Grazing food chain with example.

12th Standard Biology English Medium Botany - Ecosystem 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Discuss the gross primary productivity is more efficient than net primary productivity.

  • 2)

    Construct the food chain with the following data.
    Hawk, plants, frog, snake, grasshopper.

  • 3)

    Name of the food chain which is generally present in all type of ecosystem. Explain and write their significance.

  • 4)

    Shape of pyramid in a particular ecosystem is always different in shape. Explain with example.

  • 5)

    Generally human activities are against to the ecosystem, where as you a student how will you help to protect ecosystem?

12th Standard Biology English Medium Botany - Ecosystem 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    According to A.G. Tansley, what is an ecosystem?

  • 2)

    Mention any two climatic factors and edaphic factors of an ecosystem.

  • 3)

    Define 'Standing state' with regard to ecosystem.

  • 4)

    What are biotic components?

  • 5)

    Name the macro consumers and micro consumers.

12th Standard Biology English Medium Botany - Ecosystem 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Productivity of profundal zone will be low. Why?

  • 2)

    Pyramid of energy is always upright. Give reasons

  • 3)

    What will happen if all producers are removed from ecosystem?

12th Standard Biology English Medium Botany - Ecosystem 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Ecosystem is the structural and functional unit of ecology. This statement was given by _______

  • 2)

    Identify the incorrect option among the following component sequence.

  • 3)

    Pick out the edaphic factor among the following.

  • 4)

    Which is not a macro consumer?

  • 5)

    Photosynthetically Active Radiation ranges between the wavelength of __________

12th Standard Biology English Medium Botany - Ecosystem 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Which of the following is not a abiotic component of the ecosystem?

  • 2)

    Which of the following is / are not a natural ecosystem?

  • 3)

    Pond is a type of

  • 4)

    Pond ecosystem is

  • 5)

    Profundal zone is predominated by heterotrophs in a pond ecosystem, because of

12th Standard Biology English Medium Botany - Principles of Ecology 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain various edaphic factors that affect vegetation.

  • 2)

    What does competition refers to? Classify and describe it.

  • 3)

    Point out any five morphological adaptations of epiphytes.

  • 4)

    Explain the role of edaphic factors on vegetation.

  • 5)

    Explain various types of interaction inclusive of both positive & negative with examples.

12th Standard Biology English Medium Botany - Principles of Ecology 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Describe the mutual relationship between the fig and wasp and comment on the phenomenon that operates in this relationship.

  • 2)

    What is soil profile? Explain the characters of different soil horizons.

  • 3)

    Give an account of various types of parasitism with examples.

  • 4)

    Explain different types of hydrophytes with examples.

  • 5)

    Enumerate the anatomical adaptations of xerophytes.

12th Standard Biology English Medium Botany - Principles of Ecology 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Differentiate habitat from niche.

  • 2)

    What is thermal stratification? Explain its types.

  • 3)

    What are the adverse effects of temperature on plant?

  • 4)

    Explain briefly about the three types of fire.

  • 5)

    Classify soil based on its formation.

12th Standard Biology English Medium Botany - Principles of Ecology 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Distinguish habitat and niche

  • 2)

    What is Albedo effect and write their effects?

  • 3)

    What is mutualism? Mention any two example where the organisms involved are commercially exploited in modern agriculture.

  • 4)

    List any two adaptive features evolved in parasites enabling them to live successfully on their host?

  • 5)

    Mention any two significant roles of predation plays in nature.

12th Standard Biology English Medium Botany - Principles of Ecology 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    How Earnest Haeckel defined ecology?

  • 2)

    What is ecological hierarchy?

  • 3)

    Sequentially arrange the different units of ecological hierarchy.

  • 4)

    Define
    (a) Autecology
    (b) Synecology

  • 5)

    What is Niche?

12th Standard Biology English Medium Botany - Principles of Ecology 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Define ecology.

  • 2)

    What is ecological hierarchy? Name the levels of ecological hierarchy.

  • 3)

    What are ecological equivalents? Give one example

  • 4)

    Why are some organisms called as eurythermals and some others as stenohaline ?

  • 5)

    ‘Green algae are not likely to be found in the deepest strata of the ocean’. Give at least one reason.

12th Standard Biology English Medium Botany - Principles of Ecology 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Autoecology deals with the study of ___________.

  • 2)

    Environment of any community is called

  • 3)

    The study of soil is called as __________

  • 4)

    Identify the indicators of fire.

  • 5)

    Statement 1: Latitudes represent distance from the equator.
    Statement 2: Height above the seal level from longitude.

12th Standard Biology English Medium Botany - Principles of Ecology 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Arrange the correct sequence of ecological hierarchy starting from lower to higher level.

  • 2)

    Ecology is the study of an individual species is called
    i) Community ecology
    ii) Autecology
    iii) Species ecology
    iv) Synecology

  • 3)

    A specific place in an ecosystem, where an organism lives and performs its functions is

  • 4)

    Read the given statements and select the correct option.
    i) Hydrophytes possess aerenchyma to support themselves in water.
    ii) Seeds of Viscum are positively photoblastic as they germinate only in presence of light.
    iii) Hygroscopic water is the only soil water available to roots of plant growing in soil as it is present inside the micropores.
    iv) High temperature reduces use of water and solute absorption by roots

  • 5)

    Which of the given plant produces cardiac glycosides?

12th Standard Biology English Medium Botany - Plant Tissue Culture 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain the steps involved in protoplast culture.

  • 2)

    Point out the applications of plant tissue culture.

  • 3)

    Discuss the protocol for micropropagation of banana.

  • 4)

    Enumerate the advantages of Artificial seeds.

  • 5)

    Briefly explain about patents.

12th Standard Biology English Medium Botany - Plant Tissue Culture 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain the basic concepts involved in plant tissue culture

  • 2)

    Based on the material used, how will you classify the culture technology? Explain it.

  • 3)

    Write the protocol for artificial seed preparation.

12th Standard Biology English Medium Botany - Plant Tissue Culture 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Compare Redifferentiation with Dedifferentiation.

  • 2)

    How the autoclaving is done for culture media?

  • 3)

    Briefly explain the surface sterilization of explants.

  • 4)

    Point out the factors that determine success rate of tissue culturing.

  • 5)

    Mention any three macronutrients and micro nutrients used in MS medium.

12th Standard Biology English Medium Botany - Plant Tissue Culture 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    How will you avoid the growing of microbes in nutrient medium during culture process? What are the techniques used to remove the microbes?

  • 2)

    Write the various steps involved in cell suspension culture.

  • 3)

    What do you mean Embryoids? Write its application.

  • 4)

    Give an account on Cryopreservation.

  • 5)

    What do you know about Germplasm conservation. Describe it.

12th Standard Biology English Medium Botany - Plant Tissue Culture 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Define tissue culture.

  • 2)

    Name the four basic concepts of plant tissue culture.

  • 3)

    What is the term totipotency refers to?

  • 4)

    Define sterilization.

  • 5)

    Mention the way by which culture media and explants are sterilized.

12th Standard Biology English Medium Botany - Plant Tissue Culture 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is the name of the process given below? Write its 4 types.

  • 2)

    Give the examples for micro propagation performed plants .

12th Standard Biology English Medium Botany - Plant Tissue Culture 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Identify the group of scientists who developed the intergenic hybrid - the pomato.

  • 2)

    The production of secondary metabolites require the use of _________.

  • 3)

    Which of the following condition favours callus induction?

  • 4)

    Protoplast are the cells devoid of ___________

  • 5)

    A widely used fusogen in protoplast culture is ________

12th Standard Biology English Medium Botany - Plant Tissue Culture 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Totipotency refers to

  • 2)

    Micro propagation involves

  • 3)

    Match the following :

    1) Totipotency A) Reversion of mature cells into meristerm
    2) Dedifferentiation B) Biochemical and structural changes of cells
    3) Explant C) Properties of living cells develops into entire plant
    4) Differentiation D) Selected plant tissue transferred to culture medium
  • 4)

    The time duration for sterilization process by using autoclave is ______ minutes and the temperature is _______

  • 5)

    Which of the following statement is correct

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain how fermentation is done in bioreactor ?

  • 2)

    List out the application of single-cell protein.

  • 3)

    Give a short notes on Green Fluorescent Protein (GFP)

  • 4)

    Explain the steps involved in recombinant DNA technology

  • 5)

    Explain in detail about various types of direct gene transfer method.

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    How do you use the biotechnology in modern practice?

  • 2)

    Mention the application of Biotechnology.

  • 3)

    Is their any possibilities to transfer a suitable desirable gene to host plant without vector? Justify your answer.

  • 4)

    Compare the various types of Blotting techniques

  • 5)

    Write the advantages of herbicide tolerant crops

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Mention any three historical events which took place in the 21st century for the development of biotechnology.

  • 2)

    In the fermentation process, what does upstream and downstream refers to? Explain.

  • 3)

    What are secondary metabolites? Give two examples.

  • 4)

    What is SCP? Mention its nutritional value.

  • 5)

    Mention any three algal species used for SCP production.

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    You are working in a biotechnology lab with a becterium namely E.coli. How will you cut the nucleotide sequence? explain it.

  • 2)

    What do you know about the word pBR332?

  • 3)

    What are restriction enzyme. Mention their type with role in Biotechnology.

  • 4)

    How will you identify a vector ?

  • 5)

    Write the advantages and disadvantages of Bt cotton.

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write about the modern biotechnology.

  • 2)

    What is a fermentor?

  • 3)

    Define fermentation.

  • 4)

    What are primary metabolites? Give example.

  • 5)

    How microbial enzymes are produced? Mention its significance.

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What are the materials used to grow microorganism like Spirulina?

  • 2)

    What are the enzymes you can used to cut terminal end and internal phospho di ester bond of nucleotide sequence?

  • 3)

    Name the chemicals used in gene transfer.

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Which of the following person coined the term biotechnology?

  • 2)

    Zymology deals with __________

  • 3)

    Identify the incorrect statement:

  • 4)

    Pick out the mismatched pair(s):
    (i) Arnphotericin-B - Streptomyces notatum
    (ii) Penicillin - Penicillum nodosus
    (iii) Streptomycin - Streptomyces grises
    (iv) Tetracycline - Streptomyces aureofacins

  • 5)

    Identify the non-fungal species used in SCP production.
    (i) Candida
    (ii) Chlorella
    (iii) Chlamydomonas
    (iv) Cellulomonas

12th Standard Biology English Medium Botany - Principles and Processes of Biotechnology 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Restriction enzymes are

  • 2)

    Plasmids are

  • 3)

    EcoRI cleaves DNA at

  • 4)

    Genetic engineering is

  • 5)

    Consider the following statements:
    I. Recombinant DNA technology is popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic materials by man invitro
    II. pBR322 is the first artificial cloning vector developed in 1977 by Boliver and Rodriguez from E.coli plasmid
    III. Restriction enzymes belongs to a class of enzymes called nucleases.
    Choose the correct option regarding above statements

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain the three types of duplication with diagram.

  • 2)

    Draw a flow chart depicting the various types of ploidy.

  • 3)

    Explain hyperploidy with its types.

  • 4)

    What is translocation? Write about its types.

  • 5)

    Write the important aspects about the chromosome behavior during meiosis.

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    When two different genes came from same parent they tend to remain together.
    i) What is the name of this phenomenon?
    ii) Draw the cross with suitable example.
    iii) Write the observed phenotypic ratio.

  • 2)

    If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F1 hybrid. Now you cross F1 male with double recessive female.
    i) What type of linkage is seen?
    ii) Draw the cross with correct genotype.
    iii) What is the possible genotype in F2 generation?

  • 3)

    Write the salient features of Sutton and Boveri concept.

  • 4)

    How is Nicotiana exhibit self-incompatibility. Explain its mechanism.

  • 5)

    How sex is determined in monoecious plants. write their genes involved in it.

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What are the salient features of the chromosomal theory of inheritance ?

  • 2)

    Compare Mendelian factors with chromosome.

  • 3)

    State Coupling and Repulsion theory.

  • 4)

    Give a short note on incomplete linkage.

  • 5)

    How crossing over differs from linkage?

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain the mechanism of crossing over.

  • 2)

    Write the steps involved in molecular mechanism of DNA recombination with diagram.

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write anyone contribution of the following scientists to the field of molecular biology.
    (a) Hugo de Vries
    (b) Sutton and Boveri

  • 2)

    Define linkage. Mention its types.

  • 3)

    What does the condition synteny refers to?

  • 4)

    What are linked genes?

  • 5)

    Who coined the term crossing over? When does the crossing over occurs in a cell?

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)
    s.no gamete types Number of progenies
    1 ABC 349
    2 Abc 114
    3 abC 124
    4 AbC 5
    5 aBc 4
    6 aBC 116
    7 ABc 128
    8 abc 360

    i) What is the name of this test cross?
    ii) How will you construct gene mapping from the above given data?
    iii) Find out the correct order of genes.

  • 2)

    What is the difference between missense and nonsense mutation?

  • 3)


    From the above figure identify the type of mutation and explain it.

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Name the scientist(s) who rediscovered the Mendelian work?
    (i) Hugo de Vries
    (ii) Carl Correns
    (iii) Tschermak
    (iv) T.H. Morgan

  • 2)

    Which is not a feature of the chromosomal theory of inheritance?

  • 3)

    The following sequence represents the location of genes in a chromosome. A - B - C - M - R - S - y -Z. Which of the gene pairs will have least chance of getting inherited together?

  • 4)

    Number of chromosomes (2n) in Ophioglossum is _________

  • 5)

    Identify the syntenic gene from the given genes sequence of a chromosome G-H-I-J-K-L-M-A-B

12th Standard Biology English Medium Botany - Chromosomal Basis of Inheritance 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    An allohexaploidy contains

  • 2)

    The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

  • 3)

    Match list I with list II

    List I list II
    A. A pair of chromosomes extra with diploid i) monosomy
    B. One chromosome extra to the diploid ii) tetrasomy
    C. One chromosome loses from diploid iii) trisomy
    D.Two individual chromosomes lose from diploid

    iv) double monosomy

  • 4)

    Which of the following sentences are correct?
    1. The offspring exhibit only parental combinations due to incomplete linkage
    2. The linked genes exhibit some crossing over in complete linkage
    3. The separation of two linked genes are possible in incomplete linkage
    4. Crossing over is absent in complete linkage

  • 5)

    Accurate mapping of genes can be done by three point test cross because increases

12th Standard Biology English Medium Botany - Classical Genetics 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain Dihybrid cross in pea plant.

  • 2)

    How does the wrinkled gene make Mendel's peas wrinkled? Find out the molecular explanation.

  • 3)

    Describe incomplete dominance exhibited by Mirabilis jalapa.

  • 4)

    Write an essay on Mendel's life history.

  • 5)

    Explain Mendel's empirical approach on heredity.

12th Standard Biology English Medium Botany - Classical Genetics 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What are the reasons for Mendel’s successes in his breeding experiment?

  • 2)

    Explain the law of dominance in monohybrid cross.

  • 3)

    Describe dominant epistasis with an example.

  • 4)

    Explain polygenic inheritance with an example.

  • 5)

    Differentiate continuous variation with discontinuous variation.

12th Standard Biology English Medium Botany - Classical Genetics 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Point out any three importance of variations.

  • 2)

    List out the reasons for the selection of pea plant by Mendel.

  • 3)

    State the law of segregation.

  • 4)

    How many types of gametes are produced by heterozygous dihybrid plant with a genotype RrYy? Write them.

  • 5)

    Define trihybrid cross. Mention its F 2 phenotypic ratio.

12th Standard Biology English Medium Botany - Classical Genetics 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Differentiate incomplete dominance and codominance.

  • 2)

    What is meant by cytoplasmic inheritance

12th Standard Biology English Medium Botany - Classical Genetics 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Who coined the term genetics? Also, define it.

  • 2)

    Name the four major subdisciplines of genetics.

  • 3)

    Explain Heredity and variations

  • 4)

    Mendel's theory is a particulate theory - justify

  • 5)

    Which organism was studied by Gregor Mendel? How many traits does he considered on his experiments

12th Standard Biology English Medium Botany - Classical Genetics 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Name the seven contrasting traits of Mendel.

  • 2)

    What is meant by true breeding or pure breeding lines / strain?

  • 3)

    Give the names of the scientists who rediscovered Mendelism

  • 4)

    What is back cross?

  • 5)

    Define Genetics.

12th Standard Biology English Medium Botany - Classical Genetics 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    The term 'Genetics' was introduced by__________

  • 2)

    Which is not a correct statement?
    (A) Variations are the raw materials for evolution
    (B) Variations provide genetic material for natural selection
    (C) It helps the individual to adapt to the changing environment
    (D) Variations allow breeders to improve the crop field

  • 3)

    An allede is__________

  • 4)

    Gregor Mendel ___________
    (i) was born in Czechoslovakia
    (ii) did his experiments in Pisum fulvum
    (iii) was the first systemic researcher in genetics
    (iv) Published his results in the paper "Experiments on Plant Hybrids"

  • 5)

    How many characters studied by Mendel in pisum sativum

12th Standard Biology English Medium Botany - Classical Genetics 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Extra nuclear inheritance is a consequence of presence of genes in

  • 2)

    In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype

  • 3)

    How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

  • 4)

    Which one of the following is an example of polygenic inheritance?

  • 5)

    In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Give a comparative account on Anther wall layers

  • 2)

    Describe the development process of male gametophyte.(or) Explain the different mode of entry of pollen tube into the ovule.

  • 3)

    Explain any five types of angiospermic ovules.

  • 4)

    Describe the development of monosporic embryo sac.

  • 5)

    Enumerate the characters of anemophilous flowers

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Explain the conventional methods adopted in vegetative propagation of higher plants.

  • 2)

    Highlight the milestones from the history of plant embryology.

  • 3)

    Discuss the importance of Modern methods in reproduction of plants.

  • 4)

    Write short note on Heterostyly.

  • 5)

    Enumerate the characteristic features of Entomophilous flowers

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    How tongue grafting differs from wedge grafting?

  • 2)

    List any three advantages of micropropagation

  • 3)

    Where the stomium is located? What is its role?

  • 4)

    Briefly explain about the types of tapetum.

  • 5)

    What are the functions of tapetum

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    A detached leaf of Bryophyllum produces new plants. How?

  • 2)

    Differentiate Grafting and Layering.

  • 3)

    Distinguish mound layering and air layering.

  • 4)

    What is endothelium

  • 5)

    What is polyembryony. How it can commercially exploited.

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Write the names of organisms that undergo the following types of asexual reproduction.
    (a) Budding
    (b) fragmentation
    (c) Regeneration
    (d) Gemma cup formation.

  • 2)

    What are diaspores?

  • 3)

    Name the vegetative propagules of the following plants
    (a) Allium cepa
    (b) Zingiber Officinalis
    (c) Agave
    (d) Colocasia

  • 4)

    Point out the advantages of natural vegetative reproduction

  • 5)

    Mention any two conventional propagation techniques

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is reproduction?

  • 2)

    Mention the contribution of Hofmeister towards Embryology.

  • 3)

    List out two sub-aerial stem modifications with example.

  • 4)

    What is layering?

  • 5)

    What are clones?

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    The unit of reproductive structure used in vegetative propagation is called as __________________

  • 2)

    Which of the following aquatic plant is popularly known as the "Terror of Bengal"?

  • 3)

    The genetic ability of a plant cell to produce the entire plant is said to be ________________

  • 4)

    A typical anther is ________________

  • 5)

    Innermost layer of anther wall is ________________

12th Standard Biology English Medium Botany - Asexual and Sexual Reproduction in Plants 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Choose the correct statement from the following

  • 2)

    An eminent Indian embryologist is

  • 3)

    Identify the correctly matched pair

  • 4)

    Pollen tube was discovered by

  • 5)

    Size of pollen grain in Myosotis

12th Standard Biology English Medium Zoology - Environmental Issues 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is the primary purpose of the Kyoto Protocol?

  • 2)

    In what way Peyang conserves the forest?

  • 3)

    Describe how deforestation might contribute to global warming

  • 4)

    How does forest conservation help to reduce air pollution?

  • 5)

    List the effects of air pollution.

12th Standard Biology English Medium Zoology - Environmental Issues 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    List all the wastes that you generate, at home, school or during your trips to other places. Could you very easily reduce the generation of these wastes? Which would be difficult or rather impossible to reduce?

  • 2)

    How can we control eutrophication?

  • 3)

    Discuss the role of an individual to reduce environmental pollution.

  • 4)

    Discuss briefly the following :
    a. Catalytic converter
    b. Ecosan toilets

12th Standard Biology English Medium Zoology - Environmental Issues 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Why does ozone hole form over Antarctica?

  • 2)

    Mention the causes of enhanced use of ultraviolet radiation

  • 3)

    Discuss the role of women in protection and conservation of forests.

  • 4)

    What are particulate matter?

  • 5)

    Name the main sources of air pollution.

12th Standard Biology English Medium Zoology - Environmental Issues 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is SMOG and how it is harmful for us?

  • 2)

    Write notes on the following:
    a. Eutrophication
    b. Algal Bloom

  • 3)

    What are some solutions to toxic dumping in our oceans?

12th Standard Biology English Medium Zoology - Environmental Issues 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Discuss the causes and effects of global warming. What measures need to be taken to control global warming?

  • 2)

    What would Earth be like without the greenhouse effect?

  • 3)

    How are pollutants classified?

  • 4)

    Define air pollution.

  • 5)

    What is AQI?

12th Standard Biology English Medium Zoology - Environmental Issues 2 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Expand
    (i) CFC
    (ii) AQI
    (iii) PAN

  • 2)

    What effect can fertilizer runoff have on an aquatic ecosystem?

  • 3)

    How does recycling help reduce pollution?

12th Standard Biology English Medium Zoology - Environmental Issues 1 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    With which of the following, the Agenda 21’ of Rio Summit, 1992 is related to?

  • 2)

    Which among the following awards instituted by the Government of India for individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting Wildlife?

  • 3)

    The Ozone Day is observed every year on September 16 as on this day in 1987 the ___________was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultra-violet rays of the sun from reaching the earth. Fill the correct word in blank.

  • 4)

    The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:

  • 5)

    __________ is an example for a non persistant pollutant.

12th Standard Biology English Medium Zoology - Environmental Issues 1 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Right to Clean Water is a fundamental right, under the Indian Constitution

  • 2)

    The ‘thickness’ of Stratospheric Ozone layer is measured in/on:

  • 3)

    As per 2017 statistics, the highest per capita emitter of Carbon dioxide in the world is

  • 4)

    The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as

  • 5)

    Which among the following always decreases in a Food chain across tropic levels?

12th Standard Biology English Medium Zoology - Biodiversity and its Conservation 5 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    ‘Stability of a community depends upon its species diversity’ Justify the statement.

  • 2)

    Write a note on extinction and its types

  • 3)

    Write a note on gene banks

  • 4)

    Write the general strategies in conservation?

  • 5)

    Give an account on genetic diversity and community diversity.

12th Standard Biology English Medium Zoology - Biodiversity and its Conservation 5 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    What is mass extinction? Will you encounter one such extinction in the near future. Enumerate the steps to be taken to prevent it.

  • 2)

    In north eastern states, the jhum culture is a major threat to biodiversity – substantiate.

  • 3)

    List out the various causes for biodiversity losses

  • 4)

    How can we contribute to promote biodiversity conservation?

  • 5)

    Write a note on
    i) Protected areas,
    ii) Wild life sanctuaries,
    iii) WWF.

12th Standard Biology English Medium Zoology - Biodiversity and its Conservation 3 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Extinction of a keystone species led to loss of biodiversity – Justify.

  • 2)

    Where are biodiversity hotspots normally located? Why?

  • 3)

    Why is biodiversity so important and worthy of protection?

  • 4)

    Why has the dodo become extinct?

  • 5)

    What is an endangered species?

12th Standard Biology English Medium Zoology - Biodiversity and its Conservation 3 Mark Book Back Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Compare and Contrast the insitu and exsitu conservation.

  • 2)

    What are called endangered species? Explain with examples

  • 3)

    Why do we find a decrease in biodiversity distribution, if we move from the tropics towards the poles?

  • 4)

    What are the factors that drive habitat loss?

  • 5)

    Alien species invasion is a threat to endemic species – substantiate this statement.

12th Standard Biology English Medium Zoology - Biodiversity and its Conservation 2 Mark Creative Question Paper and Answer Key 2022 - 2023 - by Study Materials - View & Read

  • 1)

    Why do animals have greater diversification than plant diversity?

  • 2)

    Define species diversity.

  • 3)

    What is ecosystem/community diversity?

  • 4)

    Give an equation for Species-Area relationship on a log scale

  • 5)

    What is habitat fragmentation?

View all

TN Stateboard Education Study Materials

TN Stateboard Updated Class 12th Biology Syllabus

Botany - Asexual and Sexual Reproduction in Plants

Introduction - Asexual Reproduction - Vegetative Reproduction - Sexual Reproduction - Pre-fertilization structure and events - Fertilization - Post fertilization structure and events - Apomixis - Polyembryony - Parthenocarpy

Botany - Classical Genetics

Introduction - Heredity and Variation - Mendelism - Laws of Mendelian Inheritance - Monohybrid, Dihybrid, Trihybrid cross, Backcross and Testcross - Interaction of Genes-Intragenic and Intergenic Incomplete dominance, Lethal genes, Epistasis - Polygenic inheritance in Wheat kernel colour, Pleiotropy - Pisum sativum - Extrachromosomal inheritance- Cytoplasmic inheritance in Mitochondria and Chloroplast.

Botany - Chromosomal Basis of Inheritance

Chromosomal theory of Inheritance - Linkage - Eye color in Drosophila and Seed color in Maize - Crossing over, Recombination and Gene mapping - Multiple alleles - Sex determination in plants - Mutation - types, mutagenic agents and their significance.

Botany - Principles and Processes of Biotechnology

Development of Biotechnology - Historical Perspective - Traditional Biotechnology - Advancements in Modern Biotechnology - Tools for Genetic Engineering - Methods of Gene transfer - Screening for Recombiants - Transgenic Plants / Genetically Modifi ed Crops - Applications of Biotechnology.

Botany - Plant Tissue Culture

Milestones in plant tissue culture - Basic concepts in plant disuse culture - Plant tissue culture techniques and types - Plant regeneration pathway - Applications of plant tissue culture - Conservation of plant genetic resources - Intellectual rights of property (IPR), Biosafety and Bioethics - Future Biotechnology

Botany - Principles of Ecology

Ecology - Ecological factors - Ecological adaptations - Dispersal of seeds and fruits

Botany - Ecosystem

Structure of ecosystem - Functions of ecosystem - Plant succession

Botany - Environmental Issues

Greenhouse effect, ozone depletion - Forestry - Deforestation - Afforestation - Alien invasive species - Conservation - Carbon Capture and Storage (CCS) - Rainwater harvesting - Environmental Impact Assessment (EIA) - Geographic Information System

Botany - Plant Breeding

Relationship between human and plants - Domestication of plants - Origin of agriculture - History of agriculture - Organic agriculture - Plant breeding - Conventional plant breeding methods - Modern plant breeding Techniques

Botany - Economically Useful Plants and Entrepreneurial Botany

Food Plants - Spices and Condiments - Fibre - Timber - Latex - Pulp wood - Dye - Cosmetics - Traditional system of medicines - Medicinal plants - Entrepreneurial Botany

Zoology - Reproduction in Organisms

Modes of reproduction - Asexual reproduction - Sexual reproduction

Zoology - Human Reproduction

Human reproductive system - Gametogenesis - Menstrual cycle - Fertilisation and implantation - Maintenance of pregnancy and embryonic development - Parturition and lactation

Zoology - Reproductive Health

Need for reproductive health Problems and strategies - Amniocentesis and its statutory ban - Social impact of sex ratio, female foeticide and infanticide - Population explosion and birth control - Medical termination of pregnancy (MTP) - Sexually transmitted diseases (STD) - Infertility - Assisted reproductive technologies (ART) - Detection of foetal disorders during early pregnancy

Zoology - Principles of Inheritance and Variation

Multiple alleles - Human blood groups - Genetic control of Rh factor - Sex determination in human, insects, and birds - Sex-linked inheritance - Karyotyping - Pedigree analysis - Mendelian disorders - Chromosomal abnormalities

Zoology - Molecular Genetics

Gene as the functional unit of inheritance - In search of the genetic material - DNA is the genetic material - Chemistry of nucleic acids - RNA world - Properties of genetic material - Packaging of DNA helix - DNA Replication - Transcription - Genetic code - tRNA – the adapter molecule - Translation - Regulation of Gene expression - Human Genome Project (HGP) - DNA finger printing technique

Zoology - Evolution

Origin of life - Evolution of life forms - Geological time scale - Biological evolution - Evidences for biological evolution - Theories of biological evolution - Mechanism of evolution - Hardy Weinberg principle - Origin and evolution of man

Zoology - Human Health and Diseases

Common diseases in human beings: Infectious and non-infectious - Maintenance of personal and public hygiene - Basic concepts of immunology - Immunodeficency diseases - Autoimmune diseases - Adolescence – Drug and alcohol abuse - Mental health – Depression

Zoology - Microbes in Human Welfare

Microbes in household products - Microbes in industrial products - Microbes in sewage treatment and energy generation - Microbes in the production of biogas - Microbes as bio-control agents and bio-fertilisers - Bioremediation

Zoology - Applications of Biotechnology

Applications in Medicine - Gene therapy - Stem Cell Therapy - Molecular Diagnosis - Transgenic Animals - Biological products and their uses - Animal cloning - Ethical issues

Zoology - Organisms and Population

Organism and its Environment - Habitat - Major Abiotic Components or Factors - Concept of Biome and Distribution - Responses to abiotic factors - Adaptations - Populations - Population attributes - Population age distribution - Growth models / Curves - Population regulation - Population interactions

Zoology - Biodiversity and its Conservation

Biodiversity - Importance of biodiversity – Global and India - Biogeographical regions of India - Threats to biodiversity - Causes of Biodiversity Loss - IUCN - Biodiversity and its conservation

Zoology - Environmental Issues

Pollution - Air Pollution - Water Pollution - Noise Pollution - Agrochemicals - Biomagnification - Eutrophication - Organic Farming and its Implementation - Solid Waste Management - Global Environment Change - Ozone Depletion - Deforestation - Ecosan Toilets - Peoples Participation in Conservation of Forests

Zoology - Immunology

Basic Concepts of Immunology - Innate Immunity - Acquired Immunity - Immune Responses - Lymphoid Organs - Antigens - Antibodies - Antigen - Antibody Interactions - Vaccines - Vaccination and Immunization - Hypersensitivity - Immunodeficiency Diseases - Autoimmune Diseases - Tumour Immunology

TN StateboardStudy Material - Sample Question Papers with Solutions for Class 12 Session 2020 - 2021

Latest Sample Question Papers & Study Material for class 12 session 2020 - 2021 for Subjects Maths, Chemistry, Physics, Computer Science, Business Maths, Economics, Commerce, Accountancy, History, Computer Applications, Computer Technology, English, உயிரியல், கணினி பயன்பாடுகள், கணினி அறிவியல், வணிகக் கணிதம், வணிகவியல், பொருளியல், கணிதவியல், வேதியியல், இயற்பியல், கணினி தொழில்நுட்பம், வரலாறு, கணக்குப்பதிவியல், tamil in PDF form to free download [ available question papers ] for practice. Download QB365 Free Mobile app & get practice question papers.

More than 1000+ TN Stateboard Syllabus Sample Question Papers & Study Material are based on actual Board question papers which help students to get an idea about the type of questions that will be asked in Class 12 Final Board Public examinations. All the Sample Papers are adhere to TN Stateboard guidelines and its marking scheme , Question Papers & Study Material are prepared and posted by our faculty experts , teachers , tuition teachers from various schools in Tamilnadu.

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