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Evidence of Evolution

Evidence of Evolution. Fossils. Theory Evolution. Similarities In Early Development. Homologous Structures. DNA. Fossils. Preserved remains of animals, plants, and other organisms from the past Most form when organisms that die become buried in sediment (dirt, rock, etc.)

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Evidence of Evolution

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  1. Evidence of Evolution Fossils Theory Evolution Similarities In Early Development Homologous Structures DNA

  2. Fossils • Preserved remains of animals, plants, and other organisms from the past • Most form when organisms that die become buried in sediment (dirt, rock, etc.) • Scientists can determine a fossil’s age • Fossil Record • Millions of fossils that scientists have collected • Incomplete • Geologic Time Scale: Calendar of Earth’s history

  3. Relative Dating Use layers of rock Fossils found near the top of the rock are younger than the ones found at the bottom Radioactive Dating Can tell the ACTUALage Radioactive elements in rocks Determining a Fossil’s Age

  4. Similarities in Early Development • Compare the development of species during the embryonic stage

  5. Homologous Structures • Similar structures that related species have inherited from a common ancestor

  6. GEOLOGIC TIME SCALE

  7. DNA • Compare the sequence of nitrogen bases in the DNA of different species • The more similar the DNA sequences, the more closely related the two species are

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