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Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time
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The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?
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The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million
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What is the relationship between choanocytes and filter feeding?...
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