Biology

How many chambers make up the human heart?

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What type of system circulates blood around the body?
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How does an insect smell?
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What is the largest member of the weasel family in the United States?
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The India rubber man at the carnival may be suspected of having what disease?
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Which of the following animals live in large groups for protection?
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The death of every member of a particular species is known as what?
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What is a young bear called?
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Renin comes from what body organ?
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