A) Frankia
B) Anabaena
C) Azotobacter
D) Rhizobiwn
Correct Answer: C
Solution :
Azotobacter (aerobic) and Clostridium (anaerobic) are free living nitrogen fixing bacteria. While Rhizobium, Frankia are symbiotic nitrogen fixing bacteria and Anabaena is symbiotic nitrogen fixing cyanobacteria.You need to login to perform this action.
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