Biology WAEC

Which of the following is a nitrifying bacterium?

A. Rhizobium
B. Nictrobacter
C. Azolobacter
D. Nitrosomonas

Correct Answer: Option B

B. Nictrobacter

Explanation
Nitrobacters are chemoautotrophic organisms found in soil and water responsible for the oxidation of ammonium to nitrite and nitrite to nitrate.

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