Microbes in Human WelfareHard
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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