1 / 12

Evolution

Evolution. Age of Universe. Estimate: 15 Billion Years! Earth: 4.6 billion years old. Evolution of Theory. Definition Early Views Greek philosophers Judeo-Christian view “Chain of Being” Carolus Linnaeus (1707-1778) fixity of species taxonomy. Theory of Evolution (cont.).

Mia_John
Télécharger la présentation

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. Evolution

  2. Age of Universe • Estimate: 15 Billion Years! • Earth: 4.6 billion years old

  3. Evolution of Theory • Definition • Early Views • Greek philosophers • Judeo-Christian view • “Chain of Being” • Carolus Linnaeus (1707-1778) • fixity of species • taxonomy

  4. Theory of Evolution (cont.) • Jean Baptiste Lamarck (1744-1829) • inheritability • Catastrophism • Georges Cuvier (1769-1832) • Uniformitarianism (19th century) • Thomas Malthus • population biologist

  5. Theory of Evolution (cont.) • Charles Darwin (1809-1882) • English biologist/naturalist • 5 year world tour • H.M.S. Beagle • Galapagos Islands – Pacific Ocean near Ecuador • Finch Study • Natural Selection • Origin of Species (1859) • The Descent of Man (1871)

  6. Observed Examples of Natural Selection • Introduction • British Moths • DDT & House Flies • Antibiotics & Bacteria

  7. Heredity • Gregor Mendel (1822-1884) • Austrian monk / botanist • garden pea experiments • dominant and recessive • genotype vs. phenotype • Genes • units of heredity • alleles • homozygous vs. heterozygous • chromosomes

  8. Population Genetics • Mutation • major source of variability • Genetic Drift • random process in small populations • founder’s principle • Gene flow • gene sharing through sexual reproduction • cline

  9. Speciation • Definitions • species • speciation • Causes • separation • breeding times • mating displays / behavior • body structure • geographical barriers

  10. Evolution of Life • Analogy • no shared ancestry • phenotypes that evolved for similar purpose • convergent evolution • Homology • shared ancestry • parallel evolution • adaptive radiation

  11. Punctuated Equilibrium • Punctuated Equilibrium or Gradual Evolution?

  12. Continental Drift • Plate Tectonics • Pangea

More Related