A) Some of the \[{{N}_{2}}\] fixers are free living while some are symbiotic
B) All \[{{N}_{2}}\] fixing prokaryotes posses leghaemoglobin as \[{{O}_{2}}\] scavenger
C) Symbiotic \[{{N}_{2}}\] fixers performs anaerobic respiration in symbiotic state
D) Cyanobacteria can fix \[{{N}_{2}}\] in both symbiotic and free living state
Correct Answer: B
Solution :
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