A) Rhizopus
B) Nitrobacter
C) Mucor
D) All green algae
Correct Answer: B
Solution :
Nitrobacter is a \[{{N}_{2}}\] fixing organism, it fixes atmospheric free\[{{N}_{2}}\]into soluble salts like nitrites and nitrates. The fixed\[{{N}_{2}}\]is absorbed by plants when herbivores feed on these plants, the\[{{N}_{2}}\]flows on the carnivores through food chain hence it is important for the\[{{N}_{2}}\]cycle.
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