"Net primary productivity" is the amount of energy
A) used in metabolism by producers.
B) given off as heat by producers.
C) trapped by the autotrophs of an ecosystem.
D) available for consumers.
E) used in metabolism by consumers.

Question

"Net primary productivity" is the amount of energy 
A) used in metabolism by producers.
B) given off as heat by producers.
C) trapped by the autotrophs of an ecosystem.
D) available for consumers.
E) used in metabolism by consumers.

Quizplus · Accepted Answer

Net primary productivity is the difference between the capture of energy by primary producers and their own use of energy.

"Net Primary Productivity" Is the Amount of Energy