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Nitrogen-fixing bacteria like Rhizobium are associated primarily with which part of the nitrogen cycle?

ADenitrification

BNitrification

CNitrogen Fixation

DAmmonification

Answer:

C. Nitrogen Fixation

Read Explanation:

  • Rhizobium, found in root nodules of legumes, fixes atmospheric nitrogen into ammonia, making it usable for plants—this step is nitrogen fixation.


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