Multiple choice

Which of the following explanations is CORRECT concerning different populations of humans in the world?

  1. They are approximately equal in their ability to handle environmental stresses such as high altitude.

  2. They are unequal in their ability to handle environmental stresses.

  3. They all are typically disclosed to the same type of environmental stresses.

  4. They remain unaffected by environmental stresses.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Natural selection has resulted in genetic differences between populations that allow them to be more or less successful in adapting to particular stresses. Populations that have been exposed to a stress generally have the best adaptation.

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