ZoologyWhich of the following is true of net primary production?

Which of the following is true of net primary production?

  1. A

    Deserts and arctic regions have the highest productivity.

  2. B

    There is no productivity in the depths of the oceans.

  3. C

    Marine productivity is the highest along coasts and in areas where water wells up from the ocean bottom to the surface.

  4. D

    Temperate areas are more productive than tropical areas.

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    Solution:

    Net primary production (NPP) is the difference between the fixed energy by autotrophs and the energy by their respiration. The net primary production is the highest in marine ecosystems in coastal areas where water wells up from the bottom of oceans to the surface. This is because in aquatic ecosystems, coral reefs have the highest rate of NPP. It experiences a high rate of photosynthesis due to high light intensity and warm water, allowing rapid photosynthesis. 

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