Scientists have a complete fossil record showing the evolution of horses over millions of years.The fossil record indicates the legs becomes longer and the teeth larger,as ancestors of the modern horse adapted from living in forest to grasslands.This is an example of
A) punctuated equilibrium.
B) extinction.
C) a postzygotic barrier to evolution.
D) gradualism.
E) a prezygotic barrier to evolution.

Question

Quizplus · Accepted Answer

The steady changes seen in the history of horses, leading up to today's grassland-adapted species, is an example of gradual change, and thus of gradualism.

Scientists Have a Complete Fossil Record Showing the Evolution of Horses