Which of the following is a free living bacteria that help in nitrogen

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1.
Which of the following is a free living bacteria that help in nitrogen fixation?

A. Azotohacter

B. Anabaena

C. Azolla

D. Nostoc

Answer» B. Anabaena

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1.	Which of the following is a free living bacteria that help in nitrogen fixation?
A.	Azotohacter
B.	Anabaena
C.	Azolla
D.	Nostoc
Answer» B. Anabaena

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Which of the following is a free living bacteria that help in nitrogen fixation?

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