Diversification of mammals after the extinction of the dinosaurs is considered an adaptive radiation because a few mammal species rapidly evolved into most of the current mammalian lineages in a relatively short amount of time.This diversification was partially driven by the evolution of endothermic homeostasis in mammals,which is an example of
A)allopatric speciation.
B)reproductive isolation.
C)a key innovation.
D)hybridization.

Question

Quizplus · Accepted Answer

The evolution of endothermic homeostasis in mammals is considered a key innovation because it allowed for increased metabolic activity and thus, facilitated the rapid diversification of mammalian lineages after the extinction of dinosaurs. Allopatric speciation, reproductive isolation, and hybridization are not directly related to this specific adaptive radiation event.

Diversification of Mammals After the Extinction of the Dinosaurs Is