All of the following organisms were dominant, within their respective environments, at some time during the Mesozoic era. Which were the earliest to achieve dominance?
A) Dinosaurs.
B) Large marine reptiles.
C) Mammal-like reptiles.
D) Conifers.
E) Marine reptiles.

Question

Quizplus · Accepted Answer

Mammal-like reptiles, also known as synapsids or therapsids, were dominant before the Mesozoic era, specifically in the late Paleozoic era, and paved the way for mammals. Their dominance predates that of the other groups listed, which were more prominent during the Mesozoic era.

All of the Following Organisms Were Dominant, Within Their Respective