A) Anabaena
B) Chlorella
C) Nostoc
D) Tolypothrix
Correct Answer: A
Solution :
Anabaena cyanobacterium (BQA) is free living introgen fixing form of BGA which form symbiotic association with water fern Azolla. Nostoc is present in corrolloid root of Cycas.You need to login to perform this action.
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