One of the freeliving, anaerobic nitrogen fixer is:
Correct answer: B. Rhodospirillum
- A. Beijernickia
- B. Rhodospirillum
- C. Rhizobium
- D. Azotobacter
Explanation
Rhodospirillum is a free living photosynthetic anaerobic nitrogen fixing nonsulphur bacteria. It is capable of synthesizing its organic food in presence of light and in absence of O2 by a process known as bacterial photosynthesis. Beijernickia and Azotobacter are free living but aerobic nitrogen fixing bacteria. Rhizobium is a symbiotic nitrogen fixing bacteria.
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