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Transcript
Learning Targets: Evidence for Evolution Review of Natural Selection Remember Darwin came up with the Theory of Evolution. Natural selection leads to_________________________________ – traits are passed down from generation to generation and sometimes undergo changes or modifications over time Evidence for Evolution ________________________________________________________________ Shows change over time. Fossils of extinct species provide evidence of shared ancestry and how organisms and the environment have changed over time. ________________________________________________________________ Differences and similarities between organisms in different locations around the world. Provides evidence of how modern species share a common ancestor but have evolved to fit environments in different locations. ___________________________________________________________ comparing body structures, similarities and differences. ___________________________________________________________ comparing protein & DNA sequences. The greater the similarities in DNA and protein sequences, the more likely two organisms share a common ancestor. ________________________________________(ATGC) provides evidence that ALL life forms are related. ___________________________________________________________ comparison of stages of embryonic development between organisms of different species. Embryos of closely related species have similar stages of development. Anatomical Structures ___________________________________________________-structures that come from the same origin, but have different functions. homo- = same -logous = information Forelimbs of human, cats, whales, & bats ______________________________________________________ on the inside ______________________________________________________ different functions on the outside ______________________________________________________ Divergent Evolution (similar ancestor, but due to isolated environments evolve to adapt best to environment) __________________________________________________- structures that have a similar function but do NOT have similar internal structure. ______________________________________________________ on the outside ______________________________________________________ ______________________________________________________ on the inside ______________________________________________________ ______________________________________________________ Convergent Evolution (similar living environments, adapted in similar way). Convergent evolution (Analogous structures)-evolving similar solutions to similar problems. ________________________________________________: Remnants of structures that may have had important functions in an ancestral species but have no clear function in the modern species shows common ancestry with adaptations to changing environments. Summary: