Multiple choice

Why are certain bacteria called cyanobacteria?

  1. Because they possess cyanide.

  2. Because they possess blue pigment.

  3. Because they possess carbon dioxide.

  4. Because they produce their own food.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blue-green algae have a blue pigment, i.e. cyanin along with chlorophyll. Thus, they are called cyanobacteria.

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