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One of the free-living, anaerobic nitrog...

One of the free-living, anaerobic nitrogen-fixer is
Or
which of the following is a photoautotrophic bacterium

A

Beijerinckia

B

Rhodospirillum

C

Rhizobium

D

Azotobacter

Text Solution

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The correct Answer is:
B
Rhodospirillum is a free-living, anaerobic , nitrogen fixer. Both Beijerinckia and Azotobacter are free-living, nitrogen-fixing , aerobic microbes . Rhizobium is a symbiotic , nitrogen fixer.
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