The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of?

Name: Revolt
Rating: 4.5 (1200 reviews)

Question

Revolt · Accepted Answer

directional selection

Unit Test

The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of?

More from this Course