At the end of the Paleozoic era, _____ constituted about 90% of the known reptile genera.
A)therapsids
B)pelcyosaurs
C)protorothyrids
D)thecodontians
E)amphibians

Question

Quizplus · Accepted Answer

Therapsids were the dominant group of reptiles at the end of the Paleozoic era, making up about 90% of the known reptile genera. They are often referred to as "mammal-like reptiles" and were the ancestors of mammals.

At the End of the Paleozoic Era, _____ Constituted About