Biology

What are the tiny air sacs in the lungs called?

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Which of these is an example of a jawless fish?
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What are plants that grow, reproduce and die all in one season called?
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What part of a plant produces seeds?
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Which of these animals has its shelter on its back?
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What do hibernating animals live off during their deep sleep?
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Which animal was mistaken for the source of the bubonic plague?
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What is another name for artificial body parts?
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What is the primary diet of sperm whales?
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