Which of the following statements about the nitrogen cycle is false?
1. Ammonification converts organic nitrogenous matter from living organisms into
ammonium (NH4+).
2. Denitrification by bacteria converts nitrates (NO3-) to nitrogen gas (N2).
3. Nitrification by bacteria converts nitrates (NO3-) to nitrites (NO2-).
4. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.
I
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