Reduction of nitrogen-oxygen ions and compounds by some bacteria is called

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Denitrification is the process by which certain bacteria break down nitrates (NO3-) into nitrogen gas (N2) or nitrous oxide (N2O), thus reducing nitrogen-oxygen ions and compounds. This process occurs under anaerobic conditions and helps to return nitrogen to the atmosphere. The other choices - aerobic respiration, nitrification, fermentation, and deamination - do not involve the conversion of nitrogen-oxygen ions and compounds by bacteria in this way.

Reduction of Nitrogen-Oxygen Ions and Compounds by Some Bacteria Is