In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the 1. decomposer microorganisms to the surface. 2. nutrients to the surface. 3. bottom-dwelling organisms to the surface. Which of the statements given above is/are correct?
A1 and 2
B2 only
C2 and 3
D3 only
Answer & Solution
Correct answer: B. 2 only
UPSC CSE Prelims 2011 (GS-I, Set A), Q.22. Official answer key: B.
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