Biology

Which animals have gills?

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What is the name of the machine that separates blood?
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What are animals that have no backbones called?
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What is a hominid?
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From what tree did aspirin originally derive?
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What vertebrates are cold-blooded and have dry scaly skin?
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Which of these animals is a reptile?
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Which vitamin enhances the absorption of calcium from foods?
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What is the outer skeleton of organisms such as spiders and insects called?
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