Question

question 5 (3 points)
the rate at which producers use photosynthesis to produce and store chemical energy minus the rate at which they use some of this stored chemical energy through aerobic respiration is called
a) gross primary productivity (gpp).
b) net primary productivity (npp).
c) ecological efficiency.
d) resource productivity.

Explanation:

Gross Primary Productivity (GPP) is the total rate at which producers produce chemical energy through photosynthesis. Net Primary Productivity (NPP) is calculated as GPP minus the energy used by producers in aerobic respiration. Ecological efficiency refers to the efficiency of energy transfer between trophic levels. Resource productivity is about the efficient use of resources. The description in the question matches the definition of NPP.

Answer:

B. Net Primary Productivity (NPP).