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

  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?

[UPSC Civil Services Exam – 2013 Prelims]

(a) 1 only

(b) 1 and 2 only

(c) 1, 2 and 3

(d) None


Answer: (a)        

Explanation:

  • A food chain illustrates the order in which a chain of organisms feeds upon each other. Hence statement 1 is correct.
  • ​Food chains are not found within the populations of a species. Hence statement 2 is not correct.
  • A food chain does not illustrate the numbers of each organism that are eaten by others.​ Hence statement 3 is not correct.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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