Home Biology Ecosystem Nutrient Cycling and Ecosystem Services (NIS) The secondary productivity means
Biology Ecosystem Nutrient Cycling and Ecosystem Services (NIS) Single Correct MCQ
Published on: August 21, 2026

The secondary productivity means

A
Rate of increase in the biomass of autotrophs
B
Rate of increase in the biomass of heterotrophs
C
The rate at which the organic molecules are formed in an autotroph
D
The rate at which organic molecules are used up by an autotroph.

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The correct answer is:
B

Secondary productivity is the rate at which consumers (heterotrophs) produce new biomass from food intake.It occurs in animals and other consumers, not autotrophs.

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