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Which adaptation helps polar bears maintain a constant internal temperature (thermal homeostasis) in cold weather?

O three layers of fur
blubber
finding shade underground
white skin
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Final answer:

Blubber is the adaptation that helps polar bears maintain a constant internal temperature in cold weather.


Step-by-step explanation:

The adaptation that helps polar bears maintain a constant internal temperature in cold weather is blubber. Blubber is a thick layer of fat that provides insulation and helps to retain heat. It acts as a natural insulator, preventing the loss of body heat to the surrounding environment. Polar bears have a thick layer of blubber, which helps them survive in the freezing Arctic temperatures.


Learn more about Polar bear adaptations

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