Home Biology Ecosystem Previous Year Questions In relation to gross primary productivity an…
Biology Ecosystem Previous Year Questions Single Correct MCQ
Published on: August 21, 2026

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

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

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The correct answer is:
A

Gross primary productivity (GPP) refers to the total amount of organic material produced by primary producers (like plants) through photosynthesis. Net primary productivity (NPP) is the gross primary productivity minus the energy used by the plants themselves for respiration. Thus, GPP is always higher than NPP.

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