Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________?
Correct answer: B. Nitrosomonas
- A. Rhizobium
- B. Nitrosomonas
- C. Nitrobacter
- D. Pseudomonas
Explanation
Nitrosomonas carries out the first nitrification step, oxidizing ammonia or ammonium ions into nitrites. Nitrobacter performs the next step by converting nitrites into nitrates, so students may choose c when they reverse the two bacterial stages.
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