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[object Object],[object Object],[object Object],[object Object],[object Object]
Darwin’s Idea of  COMMON DESCENT ,[object Object],[object Object],[object Object],[object Object],[object Object]
The evolutionary history of organisms can be portrayed as a tree growing through time.
Genealogy of the primates
Darwin’s Idea of GRADUALISM ,[object Object],[object Object],[object Object],large ground finch small tree finch woodpecker finch
[object Object],[object Object],[object Object],Darwin’s Idea of  MULTIPLICATION of SPECIES
Darwin’s Idea of NATURAL SELECTION  as the Mechanism for Evolution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Industrial Melanism:  The Peppered Moth ( Biston betularia)
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Camouflage as an example of evolutionary adaptation
 
 
[object Object],[object Object],[object Object]
[object Object],[object Object]
At the time, Darwin did not understand the genetic basis for evolution.    Variations arise from  mutation  and  genetic recombination .    Much of the variation observed in the individuals of a  population is  heritable .
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ernst Mayr
 

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Darwin’s theory of evolution

  • 1.
  • 2.
  • 3. The evolutionary history of organisms can be portrayed as a tree growing through time.
  • 4. Genealogy of the primates
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. Industrial Melanism: The Peppered Moth ( Biston betularia)
  • 10.
  • 11.  
  • 12.  
  • 13.
  • 14.
  • 15. At the time, Darwin did not understand the genetic basis for evolution.  Variations arise from mutation and genetic recombination .  Much of the variation observed in the individuals of a population is heritable .
  • 16.
  • 17.