'Deeper rock layers' presentation slideshows

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Evolution Unit

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814

814. Compare fossils found in sedimentary rock to determine their relative age. Compare fossils found in sedimentary rock to determine their relative age. Compare fossils found in sedimentary rock to determine their relative age.

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1. Which of the following factors is necessary for natural selection to occur in a species?

1. Which of the following factors is necessary for natural selection to occur in a species?. genetic variation within a population an abundance of food resources a hospitable environment a strong family structure.

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