Multiple Choice
By a process known as _______, certain chemoautotrophic bacteria transform ammonia and ammonium into _______, which tends to be more available to plants than other forms of nitrogen.
A) nitrogen fixation; nitrate
B) nitrification; nitrate
C) nitrogen fixation; N2
D) denitrification; N2
Correct Answer:

Verified
Correct Answer:
Verified
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