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UPSC 2013: 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?
(a)1 only
(b)1 and 2 only
(c)1, 2 and 3
(d)None
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Not attemptedCorrect Answer: (a) 1 only
Statement 1 is true because a food chain is a linear sequence showing the order in which organisms feed on one another (producer → primary consumer → secondary consumer, etc.). Statements 2 and 3 are false: food chains link different species in a community, not members of the same population, and they do not depict the numbers of organisms (that is shown by pyramids of numbers/biomass). Therefore only statement 1 is correct. ([licchavilyceum.com](https://licchavilyceum.com/upsc-prelims-2013-question-paper-solved/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2013 Environment & Ecology question?▼
The correct answer is option (a): 1 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Ecosystems & Ecology Concepts question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2013, GS Paper 1, as Question 31. It falls under Environment & Ecology > Ecosystems & Ecology Concepts.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Ecosystems & Ecology Concepts?▼
UPSC has asked 48 questions from Ecosystems & Ecology Concepts (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.