Which Statement Describes the Relationship Between Ammonia Oxidizers and Nitrite

question 41

Multiple Choice

Which statement describes the relationship between ammonia oxidizers and nitrite oxidizers?

• A) Ammonium oxidizers use ammonium as an energy source, oxidizing it to nitrite. The nitrite produced then serves as the energy source for nitrite oxidizers.
• B) Ammonium oxidizers use ammonium as an energy source, oxidizing it to nitrate. The nitrate produced then serves as the energy source for nitrite oxidizers.
• C) Ammonium oxidizers use urea as an energy source, oxidizing it to nitrite. The nitrite produced then serves as the carbon source for nitrite oxidizers.
• D) Ammonium oxidizers use ammonium as an energy source, reducing it to nitrate. The nitrate produced then serves as the energy source for nitrite oxidizers.
• E) None of these explains the relationship-ammonia and nitrite are produced by different nutrient cycles which also involve sulfur reduction.

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