Following the reptilian extinctions at the close of the Mesozoic, two groups of mammals, the marsupials and_________ , diversified.
A)cephalopods
B)placentals
C)stromatolites
D)trilobites
E)eukaryotes

Question

Quizplus · Accepted Answer

The marsupials and placentals are the two main groups of mammals that have diversified since the extinction of the dinosaurs. Cephalopods, stromatolites, and trilobites are all extinct groups that do not relate to the diversification of modern mammals. Eukaryotes are a broad group of organisms with a nucleus and do not specifically relate to post-Mesozoic mammal diversification.

Following the Reptilian Extinctions at the Close of the Mesozoic