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Science Crossword Puzzle Week #6 Life Science

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Across
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This kind of animal has hair and gives birth to live babies
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This kind of animal does not have a backbone or spine
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This kind of animal has gills for extracting oxygen from water
Down
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Frogs and salamanders spend part of their lives in water, making them this type of animal
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The last name of the woman who became famous for studying Chimpanzees at a place called Gombe
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An early version of this kind of animal was called Hylonomus lyelli
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This kind of animal has hollow bones