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Posted by: chicagopsych at Fri Feb 18 10:29:33 2005 [ Email Message ] [ Show All Posts by chicagopsych ] Sticking to people as an example. Look at northern Africa. North west Africans are very different than north east Africans. West Africans (the region used for the slave trade and where most US blacks come from) tend to be of stocky build while those of east Africa tend to be of slight build. East Africans excel as distance runners, west Africans sprinting. There are many other differences as well. So here is a large region where the populations can mix and breed yet there remains differences based on region despite the lack of any physical barriers. Sometimes space alone can serve as a barrier. A gradual barrier but a barrier non the less. Look at the Florida king snake. It definitely differs in the south and north regions of the state with no water or mountain barriers. [ Hide Replies ]
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