NEET Botany Mineral Nutrition Questions Solved

NEET - 2010

The free-living, anaerobic nitrogen-fixer is

(a) Beijerinckia

(b) Rhodospirillum

(c) Rhizobium

(d) Azotobacter

(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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