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Evolution: The Origin of the Species

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Evolution: The Origin of the Species ... shape beaks were deciding tool in success failure of birds to survive beaks were primary tool for food Charles Darwin: ... – PowerPoint PPT presentation

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Title: Evolution: The Origin of the Species


1
Evolution The Origin of the Species
  • To realize the significance of Charles Darwins
    original thoughts and ideas

2
Charles Darwin Facts
  • Developed idea of Natural Selection
  • 1831 began voyage on HMS Beagle
  • employed as a naturalist
  • voyage was to take 5 years with no pay

3
Charles Darwin Actions
  • Studied and collected thousands of life-forms
    during 5 year journey
  • most famous for his observations on the Galapagos
    Islands
  • studied and observed 14 different kinds of
    finches on the islands
  • found one dominant type on each island each one
    was different

4
Charles Darwin The Finches
  • 14 different versions of finches existed on
    Galapagos Islands
  • Usually only 1-2 types of finch located on an
    island
  • major difference between finches was beak size
    shape
  • beaks were deciding tool in success failure of
    birds to survive
  • beaks were primary tool for food

5
Charles Darwin Post G.I.
  • Studied findings on finches and other life-forms
    for 20 years
  • from his studies wrote book entitled The Origin
    of the Species in 1859.
  • Was not well received went against religious
    beliefs
  • revolutionized modern scientific thought

6
Charles Darwin 4 Main Points of Book
  • All organisms produce more offspring than can
    survive
  • Variations exist in all populations of species
  • Some variations are better than others more
    beneficial for survival (which we call
    adaptations)
  • Overtime offspring of more successful organisms
    will make up the population of species

7
Charles Darwin The Outcome
  • Book basically states that Natural Forces are
    primary reasons for a species evolving not
    divine powers
  • Evolution, therefore continually is happening
  • Variations acted upon by Natural Selection Forces
    (En, Dis, CF Pred)
  • Variations are caused by numerous factors most
    likely of which are mutations in an organisms
    DNA, that then are passed on (modern genetics)
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