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What is not true regarding blue green alga?

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An Intiative by Sri Chaitanya

Colonies are surrounded by gelatinous sheath

Some members possess heterocysts which help in nitrogen fixation

They are multicellular, green eukaryotic organisms

They often form blooms in polluted water bodies

answer is C.

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Blue green alga are photoautotrophs and unicellular. These are prokaryotic organisms.

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