Chapter 21 - Reconstructing and Using Phylogenies - 21.4 - Phylogeny Is the Basis of Biological Classification - 21.4 Recap - Learning Outcomes - Page 464: 1

A monophyletic taxon includes a group of organisms that evolved from a single ancestor. A paraphyletic group is one that does not include all the descendants of a common ancestor. A polyphyletic taxon comprises more distant organisms descended from their various respective ancestors.

A monophyletic taxon includes a group of organisms that evolved from a single ancestor. A paraphyletic group is one that does not include all the descendants of a common ancestor. A polyphyletic taxon comprises more distant organisms descended from their various respective ancestors.