Biology
What is the fin on the backs of fish, some whales and dolphins called?
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Which theory states that living things come only from other living things?
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What do hibernating animals live off during their deep sleep?
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Which of these changes the most from beginning to the adult stage of its life cycle?
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What is the fin on the backs of fish, some whales and dolphins called?
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Which cell part contains instructions and determines organism characteristics?
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What part of the human skeleton protects the brain?
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What are the tiny blood vessels that connect arteries and veins?
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