Which of the following is an example of a fre | vedclass

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(B) Biological nitrogen fixation is performed by various prokaryotes.$Azotobacter$ and $Beijerinckia$ are examples of free-living,aerobic nitrogen-fix

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Rhodospirillum

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(B) Biological nitrogen fixation is performed by various prokaryotes.$Azotobacter$ and $Beijerinckia$ are examples of free-living,aerobic nitrogen-fixing bacteria.$Rhodospirillum$ is an example of a free-living,anaerobic nitrogen-fixing bacterium.$Anabaena$ and $Nostoc$ are free-living,cyanobacteria that fix nitrogen in specialized cells called heterocysts.Therefore,the correct option is $B$.

Which of the following is an example of a free-living and anaerobic $N_2$-fixing bacterium?

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