Biology

What color is a polar bear's skin?

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What are the tiny blood vessels that connect arteries and veins?
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What North American animal is mistakenly called a buffalo?
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What has been the increase in tropical sea temperatures during the past 100 years?
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Which theory states that living things come only from other living things?
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Who devised a simple test to determine the health of newborns?
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What group of animals has hollow bodies and stinging cells?
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What is behavior taught by the parent or other adults of the species called?
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What kind of stem would an oak tree have?
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