Multiple choice

Which among the following traits is a result of natural selection?

  1. Eye color

  2. Widow's peak

  3. Hitchhiker's thumb

  4. Tongue rolling

  5. Skin color
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Human skin color ranges in variety from the darkest brown to the lightest pinkish-white hues. Human skin pigmentation is the result of natural selection. Skin pigmentation in human beings evolved primarily to regulate the amount of ultraviolet radiation penetrating the skin, controlling its biochemical effects.

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