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UPSC Civil Services 2011 Prelims General Studies Paper I

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Question : 22

Total: 100

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?

1 and 2
2 only
2 and 3
3 only

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