Which of the following processes is involved in getting back nitrogen into the atmosphere?
Correct answer: B. Denitrification
- A. Nitrification
- B. Denitrification
- C. Ammonification
- D. All of the above
Explanation
Denitrification is a microbial process where nitrate (NO3−) is reduced and ultimately converted back into molecular nitrogen gas (N2). This process, carried out by denitrifying bacteria, returns nitrogen to the atmosphere, completing the nitrogen cycle.
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