In a message dated 7/26/2006 10:27:48 P.M. Eastern Standard Time,  
[EMAIL PROTECTED] writes:

Anyway,  the Biological Species Concept, as with every single other  
way of  defining species, has weaknesses. With this one, it's that it   
assumes sexual reproduction, so asexual organisms are hard to   
classify using it. Ultimately, in defining species, biologists use a   
combination of the various methods, tailored to the  situation.




Another problem is that members of a species may never have an opportunity  
to interbreed. A ring species where there are variations in a geographically  
continuous members who can interbreed with their "next door neighbor but not  
with individuals at the other end of the ring (be it around the world or around 
 a geographic barrier.) 
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