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Evolution : it’s all about mutations that aid survival and reproductive selection

Evolution : it’s all about mutations that aid survival and reproductive selection. Darwin and his evidences for evolution. Darwin’s Evidences of evolution (15-3). First, review key ideas/terms: Struggle for existence Survival of the fittest Fitness Adaptation Natural selection

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Evolution : it’s all about mutations that aid survival and reproductive selection

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  1. Evolution: it’s all about mutations that aid survival and reproductive selection

  2. Darwin and his evidences for evolution

  3. Darwin’s Evidences of evolution (15-3) • First, review key ideas/terms: • Struggle for existence • Survival of the fittest • Fitness • Adaptation • Natural selection • Descent with modification

  4. Evidence #1 (of 4) The fossil record shows transitional forms of organism • Deeper you go down, older the organism is • Ex.: ?

  5. Evidence #2 (of 4) The geographic distribution of living species shows descent with modification of organisms • Organisms with different ancestors look/behave similarly if from similar environment • Ex.: ?

  6. Evidence #3 (of 4) Homologous structures show similarities in body parts with very different uses • Ex.: ? • Some structures may no longer have function, called vestigial organs • Ex.: ?

  7. Evidence #4 (of 4) Similarities in early development shows how we all come from the same embryonic cells, in the same pattern • What does this imply? • Ex.:

  8. Which is the human embryo?

  9. Which is the human embryo?

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