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Anonymous asked in Science & MathematicsBiology · 2 months ago

Polar bears have white fur. what selective pressure may have led to the evolution of this trait?

3 Answers

  • 1 month ago

    Two natural selective pressures come to mind, the one between environmental coloring and camouflage as advantageous for inconspicuous "hunting", and the second: the correlation between hair translucency and the "warmth of the body", being advantageous in a positive feedback of "thermal homeostasis".

  • 1 month ago

    The fur is not white; it is translucent. En masse, it appears white. There are two factors. One is that the translucent hairs transmit the solar energy to the black skin, where it can be absorbed as heat. The other is camouflage.

  • Anonymous
    2 months ago

    Camouflage against a snowy background. White bears survived by hunting successfully. . Dark bears died out.

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