The cow Bos primigenius (which is bred for meat and milk) has a smaller brain and larger eyes than closely related wild species of ungulates. These traits most likely arose by ________.
A) natural selection, because these traits evolved in the population over time
B) natural selection, because these traits were not consciously selected by humans
C) artificial selection, because changes in these traits co-occurred with human selection for high milk output and high muscle content
D) artificial selection, because these animals differ from their close relatives and common ancestor

Question

Quizplus · Accepted Answer

The traits of smaller brain and larger eyes are not typical of wild ungulates, and their co-occurrence with human selection for high milk output and high muscle content strongly suggests that they arose through artificial selection.

The Cow Bos Primigenius (Which Is Bred for Meat and Milk)