the evidences of evolution

• evidences of evolution

  • fossil
  • biogeographical
  • anatomical
  • biochemical
• fossil record

  • fossils are preserved remains of ancient organisms
  • provides information about past organisms
  • shows that many diverse organisms live at different times in earth's history
• fossils

  it cannot provide DNA so scientists analyze a structural evidence to look for similarities and differences, and use chemical evidence to determine the age of it
• biogeography

  it is the scientific study of the geographic distribution of species.

  this distributions are influenced by many factors, including continental drift, the slow movement of earth's continent over time.
• this is an example of what evidence of evolution?

  modern members of the camel family

  
• biogeography meaning?

  life-earth-graphein/to draw
• another examples of biogeography:


  hawaiian honeycreepers and

  platypus and echidna
• three types of anatomical evidences

  homologous structure

  analogous structure

  vestigial structure
• • anatomically similar because they are inherited from a common ancestor
  • may be functionally similar or NOT

  homologous structures
• similar parts of different organisms, often quite dissimilar in purpose, that develop from the same ancestral body parts

  homologous structure
• example of homologous structure are:

  human, horse, bat, and porpoise
• when two species are populations evolved to become more different from each other

  • the evolution of homologous structure is always an example of this evolution

  divergent evolution
• pentadactyl limbs

  A limb with five digits, characteristic of tetrapod vertebrates (amphibians, reptiles, birds, and mammals).
• • Serve the same function
  • Not constructed similarly
  • Do not share a common ancestor

  Analogous Structures
• examples of analogous structure:


  bird wings, butterfly wings, and bat wings
• vestigial structure

  -anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species

  example: vampire bat

  
• other examples of vestigial structures are:


  appendix, whale, tailbone, and Mexican blind cave fish
• anatomical similarities in vertebrate embryos are:

  pharyngeal arches

  post-anal tail

  
• what does the picture show?

  DNA analysis

  
• Fill the blanks:

  chimpanzees; 98%

  
• The strongest and absolute evidence that we have to support common ancestry is the DNA that we share.

  Comparing sections of DNA in difference species has shown that even organisms that seem to be different, actually have large sections of identical DNA

  Molecular Evidences from DNA sequences