Multiple choice general knowledge

Lobsters have ____ blood.

  1. maroon

  2. white

  3. red

  4. blue
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lobsters have blue blood due to hemocyanin, a copper-based protein that carries oxygen in their circulatory system. Unlike humans who use iron-based hemoglobin (red), the copper in hemocyanin gives their blood a blue color when oxygenated. Maroon, white, and red are incorrect because they don't match the actual coloration of lobster blood.

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