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Tonight @ 7pm On the Origin of Species, Really Dr. Mohamed Noor, Duke University Fan us on Facebook
On the origin of species, Really Mohamed Noor Biology and Evolutionary Genetics
Evolution 2005 ,[object Object],[object Object]
Still, life on our planet  is highly diverse ,[object Object],[object Object]
We readily recognize these clusters and see as “natural” ,[object Object],[object Object]
Common descent ,[object Object],[object Object]
Common descent of life
Kirk Cameron on evolution ,[object Object]
EVOLUTION has  two fundamental processes ,[object Object],[object Object]
New lineage formation leads to the diversity of life on Earth Tree of animal life Twig of animal life
How do new forms become or persist as new species? ,[object Object],[object Object]
Start with definition: What is a “species” anyway??? On a practical level, decide based on  appearance… but how different do you have to be?
A better definition of species:  “gene pools” ,[object Object],[object Object]
“ Barrier traits” separate gene pools in two ways ,[object Object],[object Object],[object Object],[object Object]
“ Barrier traits” separate gene pools in two ways ,[object Object],[object Object],[object Object],[object Object]
Example: habitat differences ,[object Object],[object Object],[object Object],[object Object],[object Object]
Example: timing differences ,[object Object],[object Object],[object Object],[object Object]
Example: preference differences ,[object Object],[object Object]
Example: hybrid sterile ,[object Object],[object Object]
How do new species form? ,[object Object],[object Object]
Natural selection  is important ,[object Object],[object Object],[object Object]
Study system: Drosophila pseudoobscura D. persimilis ,[object Object],[object Object],[object Object],[object Object]
High discrimination Low discrimination Noor 1995  Nature
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IMPLICATIONS: ,[object Object],[object Object],[object Object]
IMPLICATIONS: ,[object Object],[object Object],[object Object],[object Object],Cyanobacteria, Algal blooms, etc.
…  and we strive to continue to understand and explain…
THANK YOU!
Q: Should all new species form in the same manner, or is species formation a “collection of special cases”? a Fan us on Facebook
a Fan us on Facebook

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On the Origin of Species, Really

  • 1. Tonight @ 7pm On the Origin of Species, Really Dr. Mohamed Noor, Duke University Fan us on Facebook
  • 2. On the origin of species, Really Mohamed Noor Biology and Evolutionary Genetics
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  • 10. New lineage formation leads to the diversity of life on Earth Tree of animal life Twig of animal life
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  • 12. Start with definition: What is a “species” anyway??? On a practical level, decide based on appearance… but how different do you have to be?
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  • 23. High discrimination Low discrimination Noor 1995 Nature
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  • 27. … and we strive to continue to understand and explain…
  • 29. Q: Should all new species form in the same manner, or is species formation a “collection of special cases”? a Fan us on Facebook
  • 30. a Fan us on Facebook