Is the evolutionary history of a species or group of species. 2. can produce similarities in body form when similar environments and natural selection have favored similar adaptations. 3. distinguishing between homology, which reflects common ancestry, and , which does not, is critical in determining evolutionary relationships. 4. a(n) is a group of species that includes an ancestral species and all of its descendants. 5. distinguish clades and thus branch points in the tree of life. 6. the use of dna and other molecules to determine evolutionary relationships is called ?