pyq/2011/prelims/22

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?

(A) 1 and 2

(B) 2 only

(C) 2 and 3

(D) 3 only