<Randy> Actually, species are also solely a human construct.  In  nature, 
there are
populations, which humans classify into species.  But  the lines that humans
use to differentiate species are often not clear cut at  all, especially at
the genetic level.>
 
Stated another way.  Initially, all species identified and named were  
distinguished based on morphometric characteristics - what they 'looked'  like.
 
Genomics proved this metric can be inaccurate.  Some organisms that  looked 
alike, didn't necessarily belong to the same species, and some that  looked 
very different were actually closely related.
 
Jerry



             ***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software.  For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html

Guidelines for posting to BEE-L can be found at:
http://honeybeeworld.com/bee-l/guidelines.htm