Daily GS Foundation MCQs - SthaapnaEnvironment Previous Year QuestionsIAS Previous Year QuestionsStaapana - March 2019Sthaapana - March 2019 - Week 4

IAS Previous Year Environment Questions – Lecture – 2 – STHAAPNA Series

With reference to food chains in ecosystems, consider the following statements: [2013]

  1. A food chain illustrates the order in which a chain of organisms feed upon each other.
  2. Food chains are found within the populations of a species.
  3. A food chain illustrates the numbers of each organism which are eaten by others.

Which of the statements given above is/are correct?

(a)1 only

(b)1 and 2 only

(c) 1, 2 and 3

(d) None


With reference to the food chains in ecosystems, which of the following kinds of organism is/are known as decomposer organism/organisms? [2013]

  1. Virus
  2. Fungi
  3. Bacteria

Select the correct answer using the codes given below.

(a)1 only

(b)2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3


Which one of the following is the correct sequence of a food chain? [2014]

(a) Diatoms-Crustaceans-Herrings

(b) Crustaceans-Diatoms-Herrings

(c) Diatoms-Herrings-Crustaceans

(d) Crustaceans-Herrings-Diatoms


A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is:

Food crop ⇒ Rat ⇒ Snake ⇒ Hawk.

In this food chain, the highest concentration of the pesticide would accumulate in which one of the following ? [2010]

(a)Food crop


(c) Snake

(d) Hawk


What would happen if phytoplankton of an ocean is completely destroyed for some reason? [2012]

  1. The ocean as a carbon sink would be adversely affected.
  2. The food chains in the ocean would be adversely affected.
  3. The density of ocean water would drastically decrease.

Select the correct answer using the codes given below:

(a) 1 and 2 only

(b) 2 only

(c) 3 only

(d) 1, 2 and 3



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