Multiple choice

Which among the following statements is correct about blue-green algae?

  1. They are photosynthetic autotrophic bacteria.

  2. They are chemosynthetic autotrophic bacteria.

  3. They are heterotrophic bacteria.

  4. They are considered as archaebacteria.
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A Correct answer
Explanation

They are unicellular, colonial or filamentous, marine or terrestrial algae. Blue-green algae have chlorophyll, similar to green plants and hence, are photosynthetic autotrophs.

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