A) Cyanophyceae
B) Chlorophyceae
C) Pheophyceae
D) Rhodophyceae
Correct Answer: A
Solution :
In Cyanophyceae plants, many filamentous forms possess some specialized cells of disputed nature called heterocysts which help in nitrogen fixation, eg, Nostoc, Anabaena etc.You need to login to perform this action.
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