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Evolution. Introduction F Cosmologies –Myth, Folklore, or Fact? –Western Traditions of Origin –Other Traditions.

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Presentation on theme: "Evolution. Introduction F Cosmologies –Myth, Folklore, or Fact? –Western Traditions of Origin –Other Traditions."— Presentation transcript:

1 Evolution

2

3 Introduction F Cosmologies –Myth, Folklore, or Fact? –Western Traditions of Origin –Other Traditions

4 Age of Universe F Estimate: 15 Billion Years! –Earth: 4.6 billion years old

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

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

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

8 Observed Examples of Natural Selection F Introduction F British Moths British Moths F DDT & House Flies F Antibiotics & Bacteria

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

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

11 Speciation F Definitions – species – speciation F Causes –separation –breeding times –mating displays / behavior –body structure –geographical barriers

12 Evolution of Life F Analogy –no shared ancestry –phenotypes that evolved for similar purpose –convergent evolution F Homology –shared ancestryshared ancestry –parallel evolution –adaptive radiationadaptive radiation

13 Punctuated Equilibrium F Punctuated Equilibrium or Gradual Evolution? Punctuated Equilibrium

14 Continental Drift F Plate Tectonics F Pangea Pangea

15 Scientific Creationism (Intelligent Design?) F Timeline F Great Flood F Empirical?


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