MCQ General

Prelims level : Mains level :
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1. Which of the following categories of Ecosystem Services is/are correctly matched?

  1. 1. Provisioning Services : Proving food, raw material & water.
  2. 2. Supporting Services : Carbon Sequestration.
  3. 3. Cultural Services : Recreational activities.
  4. Codes:


2. Which of the following add nutrients in the ecosystem?

  1. 1. Rainfall
  2. 2. Runoff water
  3. 3. Dustfall
  4. 4. Denitrification
  5. Codes:


3. Which of the following statements is/are true about Ecosystem?

  1. 1.It is defined as the community of living organisms in association with the nonliving components and their physical interaction.
  2. 2.Ecosystem is generally larger in size than
    the biosphere.
  3. 3. In Ecosystem the energy, nutrients and wastes cycle among the various biotic and abiotic components.
  4. Codes:


4. Which of the following statements is/are true about Aquatic Ecosystem?

  1. 1. Estuaries and mangrove swamps come under the category of freshwater ecosystems.
  2. 2. Planktons are the microscopic plants which are controlled by the currents in the aquatic body.
  3. 3. The growth of green algae on water bodies are the indication of eutrophication.
  4. Codes:


5. Which of the following is/are the examples of ecotone regions?

  1. 1. The border between a forest and a grassland.
  2. 2. Area between a soft-bottom and a hardbottom marine substrate.
  3. 3. The bank of a stream running through a meadow.
  4. 4. The estuary lying between river and sea.
  5. Codes:


6. Which of the following statements is/are true about Forest Ecosystem?

  1. 1. The productivity and community stability of a Coniferous forest is lower than any of the types of forest.
  2. 2. Tropical Evergreen Forests are the only forest where trees don’t shed their leaves in accordance with the seasonal changes.
  3. 3. Rosewood and Sandalwood are found in Tropical Deciduous forest.
  4. Codes:


7. Which of the following statements is/are true about Ecological Niche ?

  1. 1. A niche is a unique functional role or place of a species in an ecosystem.
  2. 2. Higher the number of niche in an ecosystem, more stable is the ecosystem.
  3. 3. Some species tend to have exact identical ecological niche in an ecosystem tom maintain stability and continuity.
  4. Codes:


8. Which of the following statements is/are true about Ecotone?

  1. 1. It is a zone of junction of two or more diverse ecosystems.
  2. 2. Both mangrove forests and grasslands are the examples of Ecotone.
  3. 3. Edge effect occurs when the territorial size of ecotone is much larger than the adjacent ones.
  4. Select the correct answer using the codes given below:


9. Consi der t he f ol l owi ng st at ement s about Di ssol ved oxygen and Bi ol ogi cal Oxygen Demand:

  1. 1 . Higher amount of wastes decreases the dissolved oxygen content of water.
  2. 2 . Higher value of BOD indicates high level of microorganisms in water.
  3. 3 . BOD is limited to biodegradable materials thus reliable for measuring pollution load.
  4. Which of the above statements is/are correct?


10. Consider the following statements regarding an ecosystem:

  1. 1 . Non living components of the environment are not the part of ecosystem.
  2. 2 . Edaphic factors are the components of ecosystem.
  3. 3 . Bi ome is the form of sub conti nent al ecosystem having similarity in vegetation.
  4. 4 . Ecosystem is the structural and functional unit of the biosphere.
  5. Select the correct answer from below given


11. Consider the following statements regarding eutrophication:

  1. 1. Due to eutrophication primary productivity becomes low.
  2. 2. Due to eutrophication Oxygen availability decreases.
  3. Which of the above stated impacts is/are correct?


12. What does the high Biological Oxygen Demand (BOD) indicates?


13. Which of the following are correctly matched with respect to Agriculture Revolution?

  1. 1. Grey Revolution – Egg Production
  2. 2. Pink Revolution – Poultry
  3. 3. Red Revolution – Tomato Production
  4. 4. Yellow Revolution – Fertilizer Production
  5. Select the correct answer using the codes given below:


14. Which of the following is/are correct with respect to types of Ecology Community?

  1. 1. Major Community: It is dependent on other communities for its existence.
  2. 2. Minor Community: It is self regulating, self sustaining and independent unit.
  3. Select the correct answer using the codes given below:


15. In which of following forms plants mostly absorb nitrogen?

  1. 1. Proteins
  2. 2. Nitrates and Nitrites
  3. 3. Ammonia
  4. Codes:


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