Multiple choice

Which of the following groups of algae are called cyanobacteria?

  1. Red algae

  2. Brown algae

  3. Blue - green algae

  4. Green algae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Blue-green algae are the only algae group that are actually cyanobacteria. These are photosynthetic bacteria that were historically classified as algae due to their ability to perform photosynthesis. Red algae, brown algae, and green algae are true eukaryotic algae, not cyanobacteria.

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