Q. One of the free-living anaerobic nitrogen-fixer is

A) Azotobacter
B) Beijernickia
C) Rhodospirillum
D) Rhizobium
Explanation

[Solution from source] Rhodospirillum is a free-living anaerobic (photosynthetic) nitrogen-fixing bacterium. Azotobacter and Beijerinckia are free-living but aerobic, and Rhizobium is symbiotic. Answer (3).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

Want to attempt the full paper?
View Full Paper Take Full Paper Online