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Ecosystems obtain nitrogen from outside ...

Ecosystems obtain nitrogen from outside through the process of

A

(A) Industrial fixation

B

(B) Electrochemical and photochemical fixation

C

(C) Biological fixation

D

(D) All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
`N_2` gas in inert and unreactive therefore it is first changed to nitrates, nitrites or ammonium.
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