At the end of the Cretaceous era, mammals diversified to fill a broad range of ecological niches. This is an example of
A) reinforcement.
B) hybrid zones.
C) phylogeny.
D) adaptive radiation.

Question

Quizplus · Accepted Answer

The diversification of mammals to fill a broad range of ecological niches is a classic example of adaptive radiation, where a group of organisms diversifies rapidly into a variety of related forms, each adapted to a specific ecological niche.

At the End of the Cretaceous Era, Mammals Diversified to Fill