Question

what is the role of double-layered fur on the bodies of polar bears
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Answer 1

the polar bear's coat has no white pigment; in fact, a polar bear's skin is black and its hairs are hollow. They have a thick layer of body fat, which keeps them warm while swimming, and a double-layered coat that insulates them from the cold Arctic air.

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Answer 2

Answer:

they prevent bears to catch cold and help in hiding in snow