One of the free-living, anaerobic nitrogen-fixer is:
Beijernickia
Rhodospirillum
Rhizobium
Azotobacter
Asymbiotic Nitrogen Fixing Bacteria -
1. Free-living aerobic bacteria - Azotobacter, Beijerinckia.
2. Free-living chemosynthetic bacteria - Desulfovibrio.
3. Free-living photoautotrophic bacteria - Chlorobium, Rhodopseudomonas.
4. Free-living cyanobacteria - Nostoc, Anabaena.
5. Free-living anaerobic bacteria - Clostridium.
-
Option 1)
Beijernickia
Incorrect Option
Option 2)
Rhodospirillum
Correct Option
Option 3)
Rhizobium
Incorrect Option
Option 4)
Azotobacter
Incorrect Option