Despite covering 70 per cent of the surface, oceans produce only how m…

Question

Despite covering 70 per cent of the surface, oceans produce only how much of the biosphere's net primary productivity?

Accepted Answer

A. 55 billion tons

1. Nutrient limits keep ocean productivity low.
2. Oceans yield 55 billion tons.
3. The rest comes from land.
_Source: syllabus Biology, Chapter 14, Ecosystem._

Answer

170 billion tons

Answer

115 billion tons

Answer

5 billion tons

Despite covering 70 per cent of the surface, oceans produce only how much of the biosphere's net primary productivity?

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