10.4 evidence of evolution key concept evidence of common ancestry among species comes from many...

Download 10.4 Evidence of Evolution KEY CONCEPT Evidence of common ancestry among species comes from many sources

If you can't read please download the document

Upload: tyler-hodge

Post on 17-Dec-2015

215 views

Category:

Documents


2 download

TRANSCRIPT

  • Slide 1
  • Slide 2
  • 10.4 Evidence of Evolution KEY CONCEPT Evidence of common ancestry among species comes from many sources.
  • Slide 3
  • 10.4 Evidence of Evolution NGSSS SC.912.L.15.1* Explain how the scientific theory of evolution is supported by the fossil record, comparative anatomy, comparative embryology, biogeography, molecular biology, and observed evolutionary change. (HIGH )
  • Slide 4
  • 10.4 Evidence of Evolution Evidence for evolution in Darwins time came from several sources. Fossils provide evidence of evolution. Fossils in older layers are more primitive than those in the upper layers.
  • Slide 5
  • 10.4 Evidence of Evolution The study of geography provides evidence of evolution. island species most closely resemble nearest mainland species populations can show variation from one island to another
  • Slide 6
  • 10.4 Evidence of Evolution Embryology provides evidence of evolution. Larva Adult barnacle Adult crab identical larvae, different adult body forms similar embryos, diverse organisms
  • Slide 7
  • 10.4 Evidence of Evolution Comparative embryology : Similar embryo development in closely related species
  • Slide 8
  • 10.4 Evidence of Evolution Human hand Bat wingMole foot Homologous structures are similar in structure but different in function. Homologous structures are evidence of a common ancestor.
  • Slide 9
  • 10.4 Evidence of Evolution Homologous Structures: Same underlying structures, different functions, different environments & common ancestor Bird Wing Porpoise Flipper The study of anatomy provides evidence of evolution.
  • Slide 10
  • 10.4 Evidence of Evolution Comparative Anatomy: Structural similarities link related species
  • Slide 11
  • 10.4 Evidence of Evolution Human hand Bat wing Mole foot Fly wing Analogous structures are not evidence of a common ancestor. The study of anatomy provides evidence of evolution. Analogous structures have a similar function.
  • Slide 12
  • 10.4 Evidence of Evolution Vestigial structures are remnants of organs or structures that had a function in an early ancestor. Ostrich wings are examples of vestigial structures. Structural patterns are clues to the history of a species.
  • Slide 13
  • 10.4 Evidence of Evolution Comparative Biochemistry Similar DNA sequences= Similar Gene segments of the DNA Code for similar traits In closely related species