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What decides what may enter or leave a cell?
asked
Jan 6
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What are reversible physical changes in matter called?
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Jan 3
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Science
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In birds, lightweight air-filled bones and a large four-chambered heart are examples of adaptations for what purpose?
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Dec 31, 2024
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Because dizygotic twins develop from two eggs fertilized by two sperm, they are no more identical than siblings born at what?
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Dec 30, 2024
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