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Which of the following statements about productivity is true ?A. Primary productivity of all ecosystems is constantB. Annual net primary productivity of the whole of the biosphere is 170 billion tons (dry weight) of organic matter.C. Gross primary productivity is the amount of biomass available for consumption to carnivoresD. Primary productivity depends upon the animal species inhabiting a particular area. |
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Answer» Correct Answer - B Primary productivity varies in different type of ecosystem. Annal net primary productivity of the whole of the biosphere is 170 billion tons (dry weight of organic matter Net primary productivity is the amount of biomass available for consumption to heterotrophs (herbivoures and decomposers). |
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