RE: evolution
September 16, 2010 at 11:24 pm
(This post was last modified: September 16, 2010 at 11:29 pm by The_Flying_Skeptic.)
(September 16, 2010 at 3:16 am)Bull Poopie Wrote: What exactly is evolution? I thought evolution was the changing of a species (e.g. giraffes necks weren't as long as what they are today). I may have a narrow perspective on evolution but I want to broaden my understanding.
Poopie.
The broadest biological definition of evolution is probably 'change in frequency of alleles in a population.'
I think it's easier to imagine evolutionary biology as a population of a species getting divided into two populations where there is no gene flow between the two populations. The lack of gene flow between the two populations, over time, leads to speciation. My definition of speciation is the event at which members of two different populations (in our case population A and population B) are so genetically different that they cannot produce offspring (parent A and parent B cannot produce offspring).
http://evolution.berkeley.edu/
http://evolution.berkeley.edu/evolibrary...ossary.php ~ best place for definition of 'gene flow' etc. IMO
