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Section 2: Evidence of Evolution

Section 2: Evidence of Evolution. What evidence supports the theory of evolution? How do fossils form? What do scientists learn from fossils?. Homologous Structures.

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Section 2: Evidence of Evolution

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  1. Section 2:Evidence of Evolution What evidence supports the theory of evolution? How do fossils form? What do scientists learn from fossils?

  2. Homologous Structures • The structure of the bones in a dolphin’s flipper, a bird’s wing, and a dog’s leg is similar. Homologous bones are shown in the same color.

  3. How Do Fossils Form? • Most fossils form when organisms that die become buried in sediments.

  4. Changes Over Time • The fossils record provides evidence about the history of life and past environments on Earth. In addition, scientists use fossils to study the rate at which evolution has occurred.

  5. End of Section:Evidence of Evolution

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