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If a radioactive isotope had a half life of 1 billion years how much of it would be left after 1 billion , 2 billion, 3 billion, and 4 billion years
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As a small change in a person's dna can cause a genetic disorder
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The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food
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Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center
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If a radioactive isotope had a half life of 1 billion years how much of it would be left after 1 bil...
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