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Darwin Evidence of Evolution

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Darwin Evidence of Evolution Remember- Analogous are structures that have similar function and appears but DO NOT share common ancestry. ex- Dolphin fluke and Fish ... – PowerPoint PPT presentation

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Title: Darwin Evidence of Evolution


1
Darwin Evidence of Evolution
2
Evidence
  • Darwin argued that living things have been
    evolving on Earth for millions of years.
  • Evidence supporting Darwins theory has come from
    many sources
  • Geographical distribution of living things
  • - Similar animals living in different places
    were the product of different lines of
    evolutionary descent.

3
  • DNA/Proteins
  • - Closely related species will have more
    similarities in their DNA and genes. Knowledge
    of DNA and Proteins.

4
  • Homologous Structures structures that share
    common ancestry.
  • Example wing, arm, and fin all have very similar
    number and organization of bones.

5
  • Remember- Analogous are structures that have
    similar function and appears but DO NOT share
    common ancestry.
  • ex- Dolphin fluke and Fishs fin
  • Homologues structures are structures that may not
    necessary look exactly alike but DO share common
    ancestry.

6
  • Vestigial Structures structures without function
  • -They are remnants of evolutionary past.
  • -Example Whales have a pelvic bone, but they
    no longer walk on land.

7
  • Developmental patterns
  • Embryos are similar when they are developing
  • It is hard to notice the difference between a
    bird embryo and a mammal embryo in the early
    stages.
  • At one point, human embryos develop a coating of
    fur!

8
  • Fossil Record
  • The fossil record provides evidence for history
    of life on earth. Paleontologists - study
    fossils.
  • Fossils Traces of dead organisms such as
    footprints, insects, bones, leaf impressions,
    etc.
  • Many things are now extinct (no longer living on
    earth) and fossils are the proof of their
    existence.
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