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The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2
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Describe how a student should adjust the microscope to see the cells on a slide more clearly?
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Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.
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