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The half-life of carbon-14 is 5,600 years. a fossil that has one-eighth the normal proportion of carbon-14 to carbon-12 is probably years old.
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The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?
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Nucleic acid certain protein cell membranes certain carbohydrates
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The half-life of carbon-14 is 5,600 years. a fossil that has one-eighth the normal proportion of car...
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