One of the free-living, anaerobic nitrogen – fixer is:
Options
(a) Beijiernickia
(b) Rhodospirillum
(c) Rhizobium
(d) Azotobacter
Correct Answer:
Rhodospirillum
Explanation:
Rhodospirillum is a free-living, anaerobic nitrogen fixer bacteria. It can synthesize its food in presence of light under anaerobic condition.