The rate of formation of new organic matter by a rabbit in a grassland is called:

Which of the following captures the maximum amount of solar energy?

In the equation $GPP - R = NPP$,what does $R$ represent?

Maximum productivity is found in

Assertion : Net primary productivity is gross primary productivity minus respiration.
Reason : Secondary productivity is produced by heterotrophs.

Justify the following statement in terms of ecosystem dynamics: "Nature tends to increase the gross primary productivity, while man tends to increase the net primary productivity".