Multiple Choice
"Nitrogen fixation" refers to the conversion of
A) carbon compounds to nitrogen compounds.
B) nitrogen gas (N2) to ammonia (NH3) .
C) ammonia (NH3) to nitrogen gas (N2) .
D) ammonium (NH4+) to nitrate (NO3-) .
E) ammonium (NH4+) to nitrite (NO2-) .
Correct Answer:

Verified
Correct Answer:
Verified
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