Respiration in PlantsHard

Question

The free-living, anaerobic nitrogen-fixer is

Options

A.Beijerinckia
B.Rhodospirllum
C.Rhizobium
D.Azotobacter

Solution

Rhodosiprillum is a free-living , anaerobic, nitrogen fixer. Both beijerinckia and Azotobacter are free-living, nitrogen-fixing, aerobic microbes. Rhizobium is a symbotic, nitrogen-fixer.

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