All modern reptiles (including birds)are members of the _______ lineage.They are derived from ancestors that had upper and lower openings in the temporal region of the skull.
A)diapsid
B)amphiapsid
C)anapsid
D)synapsid
E)triapsid

Question

Quizplus · Accepted Answer

The diapsid lineage is characterized by the presence of two openings, one above and one below the eye socket, in the temporal region of the skull. All modern reptiles, including birds, are members of this lineage. Amphiapsids have a single upper and lower opening, anapsids lack the openings altogether, synapsids have a single lower opening, and triapsids have three openings.

All Modern Reptiles (Including Birds)are Members of the _______ Lineage