Biology
What fluid-filled sac surrounds the human embryo?
More Questions from Biology
Which digestive organ sends the broken-down nutrients out to the body?
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What is the tube that carries food into the stomach called?
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Rainfall made sufficiently acidic by atmospheric pollution is called what?
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What two classification labels are used in the scientific name of an organism?
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What is a name for the place where an animal lives?
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What organ filters blood and helps regulate salt and water levels?
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What animal builds lodges, dams up rivers and has large front teeth for gnawing?
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