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Keep a look at shoutbox archive...


there are some versions for species... one of the best but even with problems... is this one: "discrete group of individual organisms that can be diagnosed, or defined on the basis of certain specialized features, and that had a common ancestor and unique evolutionary history." and in nature we had so many greys, that perhaps just genes are the unique that can be considered discrete units. the genes are virtually ethernal, the species not. :(