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Why is it an advantage to be warm-blooded?
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Mammals, along with birds, are animals that are warm-blooded. This means they can make heat inside their bodies, and can stay active even when it is cold. As a result, they can hunt even in the chill of the night and live in places as cold as the polar wastes. | | A polar bear |
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Previous:
Back
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Book:
1001
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Section:
Nature
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Chapter:
Land Mammals
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