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Regarding most of the narrator’s story, which word best describes the tone?
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Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this
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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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Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
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Briefly describe how cell differentiation occurs in the developing animal embryo...
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