SORU: boş bırakılan yere parçanın anlam bütünlüğünü sağlamak için getirilebilecek cümleyi bulunuz
Naming species is a convenience applied by biologists as they try to group similar animals together. Ernst Mayer, long ago, defined a species as a group of actually or potentially interbreeding natural populations. — But there are at least a dozen other ways to define and categorize species, involving evolutionary history, morphology or DNA analysis. The problem is that evolution does not act on species directly.