1 / 16

The Evolution of Evolution

The Evolution of Evolution. Consider…. 10:30 pm on December 31: the first human-like animals emerge Modern-looking humans have only been around for 100,000 years. Evolution. Pre-Darwin Plato and Aristotle Carolus Linnaeus (1717-1778). Jean-Baptiste Lamarck (1744-1829).

rasha
Télécharger la présentation

The Evolution of Evolution

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Evolution of Evolution

  2. Consider… • 10:30 pm on December 31: the first human-like animals emerge • Modern-looking humans have only been around for 100,000 years

  3. Evolution • Pre-Darwin • Plato and Aristotle • Carolus Linnaeus (1717-1778)

  4. Jean-Baptiste Lamarck (1744-1829) • Continual adjustment • Ideas were flawed

  5. Lamarck vs. Darwin

  6. Georges Cuvier (1769-1832) • Catastrophism • i.e., Noah’s flood

  7. Sir Charles Lyell (1797-1875) • Geological change was slow and continual , not due to catastrophes • uniformitarianism • Corresponded with Darwin

  8. Alfred Russel Wallace (1823-1913) • Reached similar conclusions as Darwin

  9. Charles Darwin (1809-1882)

  10. The Voyage of the HMS Beagle1831-1836Galapagos Islands

  11. The Principles of Natural Selection According to Darwin • Variation • The essential underlying feature of evolution • Random mutations create a variety of individuals, some of whom are better suited to the environment

  12. The Principles of Natural Selection According to Darwin 2. Heritability • Offspring inherit characteristics from their parents

  13. The Principles of Natural Selection According to Darwin • Differential Reproductive Success • “Natural Selection” • Those who inherit favorable characteristics will thrive • Those who do not will die out

  14. British Moths and Kettlewell’s Experiment

  15. Directional vs. Normalizing Selection • Directional: adaptation toward an adaptive change • i.e., the peppered moth • Normalizing: adaptation against extremes • i.e., birth weight

  16. Evolution After Darwin • “Punctuated Equilibrium” • Stephen Jay Gould • The mapping of the human genome has changed everything • Genetic mutation is not the only element of change • “Switch” Genes

More Related