On figure 14.20, circle a monophyletic group, a paraphyletic group, and a polyphyletic group. Describe the qualities that define how each group is classified.

Figure 14.20

Transcribed Image Text:

• Light bones • 3-toed foot Coelophysis Last • Wishbone • Breastbone • Loss of 4th and 5th fingers common Allosaurus ancestor of theropods Sinosauropteryx • Downlike feathers • Longer arms and hands • Complex feathers Protarchaeopteryx •· Arms as long as 5 Archaeopteryx or longer than legs • Feathers support flight Modern birds Coelophysis Sinosauro pteryx Archaeopteryx Allosaurus Protarchaeopteryx Modern birds