How do scientists know when life began?
a. stratigraphic study of layers of rock and the fossils found in them
b. study of the bones of dinosaurs and other extinct organisms
c. a combination of stratigraphy and radiometric dating
d. radiometric dating helped determine the age of rocks and the fossils found in them
Answers: 2
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Which of the following explains why a tree is often used as a model to represent the principle of common descent
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In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48
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Make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations.
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Qué sucede cuando una persona tiene muy poco o demasiado costeroides?
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How do scientists know when life began?
a. stratigraphic study of layers of rock and the fossils fo...
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