Question

name one biological nitrogen fixer

Answer 1

Biological nitrogen fixation (BNF) is the process whereby atmospheric nitrogen (N=N) is reduced to ammonia in the presence of nitrogenase. Nitrogenase is a biological catalyst found naturally only in certain microorganisms such as the symbiotic Rhizobium and Frankia, or the free-living Azospirillum and Azotobacter.

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Answer 2

A bacteria named Rhizobium is a biological nitrogen fixer. hope it helps