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

Options

  1. A70%
  2. B55%
  3. C170%
  4. DNone of the above

Correct answer

B. 55%

Step-by-step solution

A constant input of solar energy is the basic requirement for any ecosystem to function and sustain. Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. It is expressed in terms of weight (g m–2) or energy (kcal m–2). The rate of biomass production is called productivity. It is expressed in terms of gm–2 yr –1 or (kcal m–2) yr–1 to compare the productivity of different ecosystems. It can be divided into gross primary pro

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