Practice test

Environmental ecology - Test Set 2

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?
    1. Volcanic action
    2. Respiration
    3. Photosynthesis
    4. Decay of organic matter

    Select the correct answer using the code given below.
    1. 1 and 3 only
    2. 2 only
    3. 1, 2 and 4 only
    4. 1, 2, 3 and 4
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  2. Question 2

    Which one of the following is the best description of the term “ecosystem”?
    1. A community of organisms interacting with one another
    2. That part of the Earth which is inhabited by living organisms
    3. A community of organisms together with the environment in which they live.
    4. The flora and fauna of a geographical area.
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  3. Question 3

    With reference to ‘dugong’, a mammal found in India, which of the following statements is/are correct?

    1. It is a herbivorous marine animal.

    2. It is found along the entire coast of India

    3. It is given legal protection under Schedule 1 of the Wildlife (Protection) Act, 1972.
    Select the correct answer using the code given below.
    1. 1 and 2
    2. 2 only
    3. 1 and 3
    4. 3 only
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  4. Question 4

    Which one of the following is the national aquatic animal of India?
    1. Saltwater crocodile
    2. Olive ridley turtle
    3. Gangetic dolphin
    4. Gharial
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  5. Question 5

    Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp. In which part of India has it been discovered?
    1. Andaman Islands
    2. Anaimalai Forests
    3. Maikala Hills
    4. Tropical rain forests of northeast
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  6. Question 6

    What is/are unique about ‘Kharai Camel’, a breed found in India?
    1. It is capable of swimming up to three kilometres in seawater.

    2. It survives by grazing on mangroves.

    3. It lives in the wild and cannot be domesticated.

    Select the correct answer using the code given below.
    1. 1 and 2 only
    2. 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
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  7. Question 7

    With reference to an initiative called ‘The Economics of Ecosystems and Biodiversity (TEEB)’, which of the following statements is/are correct?
    1. It is an initiative hosted by UNEP, IMF and World Economic Forum.

    2. It is a global initiative that focuses on drawing attention to the economic benefits of biodiversity.

    3. It presents an approach that can help decision-makers recognize, demonstrate and capture the value of ecosystems and biodiversity.

    Select the correct answer using the code given below.
    1. 1 and 2 only
    2. 3 only
    3. 2 and 3 only
    4. 1, 2 and 3
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  8. Question 8

    With reference to ‘Red Sanders’, sometimes seen in the news, consider the following statements:
    1. It is a tree species found in a part of South India.

    2. It is one of the most important trees in the tropical rain forest areas of South India.
    Which of the statements given above is/are correct?

    1. 1 only
    2. 2 only
    3. Both 1 and 2
    4. Neither 1 nor 2
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  9. Question 9

    Which of the following statements is/are correct?
    Viruses can infect

    1. bacteria

    2. fungi

    3. plants

    Select the correct answer using the code given below.
    1. 1 and 2 only
    2. 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
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  10. Question 10

    MBA stands for
    1. Man and Biosphere
    2. Man, Antibiotic and Bscteria
    3. Man and Biotic Community
    4. Mayer, Andersand and Bisby
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  11. Question 11

    Biome have -
    1. plant communities
    2. animal communities
    3. trees only
    4. Both A and B
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  12. Question 12

    BOD stands for -
    1. Biochemical Oxygen Demand
    2. Biotic Oxygen Dropping
    3. Biochemical Oxygen Dressing
    4. None of the above
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  13. Question 13

    Profuse growth of aquatic vegetation that often changes the colour of water body is known as
    1. Algal bloom
    2. Eutrophication
    3. Fermentation
    4. Both A and B
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  14. Question 14

    Habitats resulting from lava now is an example of
    1. Primary succession
    2. Secondary succession
    3. Autogenic succession
    4. Allogenic succession
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  15. Question 15

    The temperature of water for water measuring BOD should be maintained at
    1. 20° C
    2. 30° C
    3. 35° C
    4. 40° C
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  16. Question 16

    Mulching prevents the loss of
    1. microbes
    2. moisture
    3. mineral
    4. organic matter
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  17. Question 17

    An ecosystem consists of
    1. population
    2. a biotic community
    3. a population and its non-living elements
    4. a biotic community and its non-living elements
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  18. Question 18

    What is Plankton?
    1. Large plants in water
    2. Microscopic floating organisma- Plants and animals.
    3. Bottom dwelling aquatic organisms
    4. None of the above
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  19. Question 19

    Biotic environment includes
    1. Consumers
    2. Decomposers
    3. producers
    4. All of the above
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  20. Question 20

    BOD value will be maximum in
    1. waste water
    2. river water
    3. rain water
    4. sewage water
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