The only therapsid group which survived to enter the Mesozoic was the
A)cynodonts.
B)pelycosaurs.
C)sphenacodontines.
D)theropods.

Question

Quizplus · Accepted Answer

Cynodonts were the only therapsid group that survived the Permian-Triassic extinction event and went on to thrive in the Mesozoic era. Pelycosaurs and sphenacodontines were both extinct by the end of the Permian period. Theropods were a group of dinosaurs that did not evolve until the later part of the Mesozoic era.

The Only Therapsid Group Which Survived to Enter the Mesozoic