What makes an animal?
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What is the difference between a prey and a predator?
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What is the food chain? How does it work?
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What is the difference between an invertebrate and a vertebrate?
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Do animals without hearts exist?
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Is all blood the same color?
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What is a heart for? What does it do?
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What is a parasite?
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What is an amphibian?
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What does a caterpillar grow into? Why does it change?
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Is it possible for another animal to eat a human?
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