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neet BIOLOGYMedium

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

A
  1. Gross primary productivity is always more than Net primary productivity.
B
  1. Gross primary productivity and Net primary productivity are one and the same.
C
  1. There is no relationship between Gross primary productivity and Net primary productivity.
D
  1. Gross primary productivity is always less than net primary productivity.

Step-by-Step Solution

Gross Primary Productivity (GPP) is the rate of production of organic matter during photosynthesis. A considerable amount of this GPP is utilized by plants in respiration. Net Primary Productivity (NPP) is defined as GPP minus respiration losses (R). Therefore, mathematically, GPP is always greater than NPP .

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