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Which of the following is incorrect about Cynobacteria?

(1) They have chlorophyll 'a' similar to green plants

(2) They are photoautotrophs

(3) They lack heterocysts

(4) They often form blooms in polluted water bodies
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Biological classification, Blue green algae

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Ans: (3) They lack heterocysts

Sol. Cynobacteria have heterocyst that fixes atmospheric nitrogen to ammonia.

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