Net primary productivity is the rate
A) at which producers manufacture chemical energy through photosynthesis.
B) at which producers use chemical energy through respiration.
C) at which producers manufacture chemical energy minus energy used through respiration.
D) at which chemical energy is transferred from one trophic level to the next.
E) at which consumers use chemical energy through respiration.

Question

Quizplus · Accepted Answer

Net primary productivity (NPP) is the rate at which producers (such as plants) manufacture chemical energy through photosynthesis, minus the energy they use through respiration. NPP represents the energy available to the rest of the ecosystem for consumption by primary consumers. Therefore, option C is the correct answer.

Net Primary Productivity Is the Rate