Have you ever noticed that when you are startled, afraid, or chilled the hair on your arms or the
back of your neck stands up? Do you think this might be like the hedgehog’s adaptive trait?
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Answer:
they are called goosebumps
Explanation:
Like your wisdom teeth and you tailbone, goose bumps serve no purpose in modern humans. they're created by itty-bitty muscles in our hair follicles, which raise the bumps as a reflex reaction to a sudden drop in temperature or feeling of panic, anger or extreme fear.
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