A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is (a) Tolypothrix (b) Chlorella (c) Nostoc (d) Anabaena.

A free living nitrogen-fixing cyanobacterium which
can also form symbiotic association with the water
fern Azolla is
(a) Tolypothrix (b) Chlorella
(c) Nostoc (d) Anabaena.
by

1 Answer

Answer :

(d) Anabaena.
by

Related questions

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