Pivot Point Skin 106 Practice Test

Which algae are cyanobacteria found in natural water bodies and contain B vitamins, calcium, and protein?

Blue-Green Algae Green Algae Brown Algae Red Algae

Correct Answer:

Blue-Green Algae

Explanation:

Cyanobacteria are photosynthetic bacteria that many people call blue-green algae because they commonly appear in natural water bodies, sometimes forming visible blooms. They’re associated with nutrients like B vitamins, calcium, and protein, which is why this option fits the description. The other algae types—green, brown, and red—are true algae (eukaryotic organisms) with different pigments and cellular structures, and they are not cyanobacteria, so they don’t match the clue about being cyanobacteria in natural waters.

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