Horses have one of the most complete fossil records of any living organism. Some species of horses are shown, along with an approximate time of when they lived. It is hypothesized that all these horses are closely related to each other.


Which is the best conclusion that can be made about these horses over time?

Responses

Beneficial gene mutations resulted in physical changes to the horses.

Beneficial gene mutations resulted in physical changes to the horses.

Dietary changes caused the physical appearance of the horses to change.

Dietary changes caused the physical appearance of the horses to change.

The environments in which the horses have lived have remained unchanged.

The environments in which the horses have lived have remained unchanged.

Horses began to change in response to changes to other organisms in their ecosystems.

Horses began to change in response to changes to other organisms in their ecosystems.