N2 content is kept constant in the biosphere due to___ – McqOptions

MCQOPTIONS

1.	N2 content is kept constant in the biosphere due to___
A.	N2 fixation
B.	industrial pollution
C.	nitrogen cycle
D.	absorption of N2 Answer u0026 Explanation
Answer» D. absorption of N2 Answer u0026 Explanation

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