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

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

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