Biology

What is another name for the portion of Earth that sustains life?

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What is any permanent change to a gene called?
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Which of these do organisms use to make energy?
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What is the largest crocodilian in the world?
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Which of the following is not a risk factor for high blood pressure?
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Which of these is a way dogs communicate with each other?
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Which of these animals is warm-blooded?
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What happens to your skin's blood vessels as you exercise?
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What substance in your ears helps keep germs and dirt out?
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