Biology

How many chambers make up the human heart?

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What animal has the largest brain?
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What are the tiny air sacs in the lungs called?
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What is the outside covering of a plant's root called?
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Which of these scientists along with James Watson helped discover the DNA molecule?
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Which of these is the oddest trait of a Dalmatian puppy?
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What is a name for the place where an animal lives?
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What is another name for the immune system?
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Which of these animals might compete for the same food source as a red-tailed hawk?
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