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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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Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment
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Scientific evidence is most likely to be consistent if it is based on data from
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Aprotein transcribed from rna would have been coded from what...
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