Subtraction of which of the following will convert gross primary produ – McqOptions

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1.	Subtraction of which of the following will convert gross primary productivity into net primary productivity?
A.	the energy used by autotrophs in respiration
B.	the energy fixed by photosynthesis
C.	all solar energy
D.	the energy contained in the standing crop
Answer» B. the energy fixed by photosynthesis

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