A. conversion of nitrates to nitrogen B. fixing nitrogen into plants C. conversion of nitrates to nitrites D. changing of ammonia to nitrities, then nitrates E. nitrogen cycle
Correct Answer: D
Explanation
The correct answer is:
D. changing of ammonia to nitrites, then nitrates
Nitrification is a process in the nitrogen cycle where ammonia (NH₃) is first converted into nitrites (NO₂⁻) by nitrifying bacteria, and then further converted into nitrates (NO₃⁻) by other nitrifying bacteria. This makes nitrogen available to plants in a form they can absorb.
