What is the contribution of the oceans to the primary productivity of the biosphere?

What is the contribution of the oceans to the primary productivity of the biosphere?
  1. 70%
  2. 55%
  3. 170%
  4. None of the above

Solution

Despite occupying about 70% of the surface, the productivity of the oceans are only 55 billion tons.

Asked in: NCERT

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