Which of the following is free-living aerobic non- photosynthetic nitr – McqOptions

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1.	Which of the following is free-living aerobic non- photosynthetic nitrogen fixing bacterium [CBSE PMT 1997; BHU 2003]
A.	Rhizobium
B.	Azotobacter
C.	Nostoc
D.	Azospirillum
Answer» C. Nostoc

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