Plant KingdomHard

Question

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

Options

A.Tolypothrix
B.chlorella
C.Nostoc
D.Anabaena

Solution

Anabaena is a free living nitrogen - fixing cyanobacterium which can form symbiotic association with water fern Azolla.

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