BotanyWhich of the following is incorrect about Cyanobacteria?

Which of the following is incorrect about Cyanobacteria?

  1. A

    They have chlorophyll 'a' similar to green plants

  2. B

    They are photoautotrophs

  3. C

    They lack heterocysts

  4. D

    They often form blooms in polluted water bodies

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    Solution:

    The cyanobacteria (also referred to as blue-green algae) have chlorophyll a similar to green plants and are photosynthetic autotrophs. The cyanobacteria are unicellular, colonial or filamentous, freshwater/marine or terrestrial algae. The colonies are generally surrounded by gelatinous sheath. They often form blooms in polluted water bodies. Some of these organisms can fix atmospheric nitrogen in specialised cells called heterocysts, e.g., Nostoc and Anabaena.

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