Biology

What color is a polar bear's skin?

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Why must ferns live in moist environments?
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How fast can the peregrine falcon go in a dive?
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What do we call the teeth we grind our food with?
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What is the second stage of incomplete metamorphosis called?
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Photosynthesis in plants produces which products?
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Which of the following is not a risk factor for high blood pressure?
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What vitamin does the sun's ultraviolet rays help the skin produce?
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What organ filters blood and helps regulate salt and water levels?
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