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15-3 Evolution in Process

15-3 Evolution in Process. More Evidence of Evolution. Homologous, Analogous and Vestigial Structures. Homologous features- similar features that originated in a shared ancestor. Evidence of evolution-.

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15-3 Evolution in Process

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  1. 15-3 Evolution in Process More Evidence of Evolution

  2. Homologous, Analogous and Vestigial Structures • Homologous features- similar features that originated in a shared ancestor.

  3. Evidence of evolution- • Analogous features- in evolution, structures in more than one organism that have similar appearance and function but different embryological origin an lack of a common ancestor.

  4. Vestigial structures- • Were useful to an ancestor but have no real use to the modern organism. Ex. Appendix, tail bone in humans.

  5. More similarities of evolution- • Embryology-many embryos of different vertebrates and other organisms look similar. • Similar macromolecules- RNA, DNA and proteins like hemoglobin.(Chemistry)

  6. Patterns of Evolution: • Coevolution- change of two or more species in association with each other. • Convergent evolution- organisms with different ancestors develop similar features. Ex. Shark, dolphin • Divergent evolution- organism with a common ancestor evolve differently. Ex. Dogs- german shepard and a poodle.

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