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UPSC 2014: Which one of the following is the correct sequence of a food chain?
(a)Diatoms-Crustaceans-Herrings
(b)Crustaceans-Diatoms-Herrings
(c)Diatoms-Herrings-Crustaceans
(d)Crustaceans-Herrings-Diatoms
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Not attemptedCorrect Answer: (a) Diatoms-Crustaceans-Herrings
In a marine food chain, the correct sequence follows the flow of energy from producers to primary consumers to secondary consumers. Diatoms are microscopic phytoplankton that serve as primary producers through photosynthesis. Crustaceans (such as copepods and krill) are primary consumers that feed on diatoms. Herrings are small fish that are secondary consumers feeding on crustaceans. Thus the correct food chain sequence is: Diatoms → Crustaceans → Herrings. Hence, option (a) is correct.
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Frequently Asked Questions
What is the correct answer to this UPSC 2014 Environment & Ecology question?▼
The correct answer is option (a): Diatoms-Crustaceans-Herrings. 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 2014, GS Paper 1, as Question 80. 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.