Which is a physical characteristic of a fish?
feathers
fur
fins
wings...
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What is the difference between a scientific hypotheses and a scientific theory?
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Overtime the pond slowly becomes more acidic due to the release of chemicals from a nearby factory. which of the organisms would most likely survive the change to their environment?
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Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water
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