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Ecology and Environment

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  1. Which among the following are regarded as secondary pollutants?
  1. Chlorofluorocarbons
  2. Volatile organic compounds
  3. Peroxyacetyl nitrate(PAN)
  4. Ground level Ozone.

Select the correct answer using the code given below.

  1. 1 and 4 only
  2. 1 and 3 only
  3. 3 and 4 only
  4. 2 and 3

2. Which of the following statements regarding nutrient cycling are true?

  1. Phosphorus and Sulphur cycles are examples of sedimentary nutrient cycles where the reservoir is earth’s crust.
  2. A Gaseous nutrient cycle is one where the reservoir is the atmosphere only.

Select the correct answer using the code given below.

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

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3. Consider the following statements regarding the reasons for biodiversity loss:

  1. Introduction of foreign species
  2. Environmental degradation
  3. Loss of habitat

Which of the following statement(s) is/are correct?

  1. Only 1
  2. 1 and 2
  3. 2 and 3
  4. All of the above


4. Which of the following effects are likely to happen with the increase in the quantity of greenhouse gases in the atmosphere?

  1. It will affect the plant growth rate.
  2. It will result in depletion of the ozone layer
  3. It can cause smog pollution

Select the correct answer from the following codes.

  1. Only 1
  2. Only 1 and 2
  3. Only 2 and 3
  4. 1, 2 and 3


5. Which of the following economic activities is the largest contributor to greenhouse gases at the global level?

  1. Industry
  2. Agriculture, forestry and other land use
  3. Electricity and Heat Production
  4. Transportation

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6. Identify the given pollutant using its attributes as given below.

  1. The density of the compound is slightly lesser than air.
  2. It is generated due to incomplete combustion of hydrocarbons.
  3. The gas combines with haemoglobin affecting its oxygen-carrying capacity to tissues.

Select the correct answer from below.

  1. Carbon Monoxide
  2. Carbon dioxide
  3. Dioxin
  4. Nitrogen Dioxide


7. Identify the wrong statement from the given below:

  1. The flow of energy is unidirectional and noncyclic.
  2. There is no dissipation of nutrients at any level of the nutrient cycle.
  3. Isolated food chains increase the stability of an ecosystem.
  4. Microorganisms have little role in the flow of energy.


8. Which of the following can be considered as impacts of acid rain?

  1. An increase in soil leaching leading to a reduction in soil fertility.
  2. Biomagnification of toxic heavy metals in living organisms
  3. An increase in decomposition rate of soil organic matter

Select the correct answer using the code given below.

  1. 1 only
  2. 1 and 2 only
  3. 2 and 3 only
  4. 1 , 2 and 3 

9.Consider following statement about the estuary.

  1. An estuary is place where the river fresh water meets with ocean water
  2. The area represents an ecotone which is highly productive.

Select the correct answer from the following codes

  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2 

10. Consider the following statements regarding bioindicators:

  1. A bioindicator is a dead or living organism that gives us an idea of the health of an ecosystem.
  2. A bioindicator should provide both quantitative and qualitative information on the environment around it.

Which of the above statements is/are NOT correct?

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

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