A)Monophyletic
B)Polyphyletic
C)Paraphyletic
D)A subset of the class Aves
E)None of the choices is correct.

A)two pairs of openings separated by a bony arch.
B)a single pair of openings and a bony arch.
C)no temporal openings and the skull roofed with dermal bone.
D)three pairs of openings to accommodate the nerves from an expanding sensory system.
E)a beak-like process that associates the turtles and the birds.

A)A tough,scaly skin that provides protection against desiccation
B)Some form of copulatory organ permitting internal fertilization
C)A shelled egg that can be laid on dry land
D)More muscular jaws
E)All of the choices are nonavian reptilian characteristics.