A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is.

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Q 2754591454.     A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is.
AIPMT 2004
A

Tolrporhrix

B

Chlorel!a

C

Nostoc

D

Anabaena.

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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