In ecology, which process carried out by specialized soil bacteria converts atmospheric nitrogen gas () into biological ammonia ()?
Answer and explanation
Correct answer: D. Nitrogen fixation
- Step 1: Nitrogen-fixing bacteria (such as Rhizobium in legume root nodules) convert unreactive gas into bioavailable ammonia. Answer: Nitrogen fixation. Why not the others: Denitrification converts nitrates back into nitrogen gas.
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