Adaptation:
Question 10
The fossil record of horses shows that early horses were much smaller and possessed more toes than modern horses (which now only posess one toe). Which of the following best describes how the traits of horses changed?
Select one:

The horses were browsing in higher and higher trees during their lifetimes, which caused their body size and toes to change.

Mutations for larger size and fewer toes gradually arose over time, and these mutations were favored by natural selection.

The horses that encountered larger predators themselves grew larger and their toes became reduced to help them run faster.

Female horses preferred males that were larger and had fewer toes because they wanted their offspring to possess those traits.