Net Primary Productivity

Multiple Choice

Net primary productivity

A) is the rate at which producers manufacture chemical energy through photosynthesis
B) is the rate at which producers use chemical energy through respiration
C) is the rate of photosynthesis plus the rate of respiration
D) is the rate at which producers use photosynthesis to produce and store chemical energy
E) is the rate at which producers use photosynthesis to produce and store chemical energy minus the rate at which they use this energy through aerobic respiration