Question

ordering horse ancestors
paleontologists have discovered several ancestors of
the modern horse.
based on the skeleton, the skull, and the leg bones,
which fossil is the oldest?
which fossil is most like a modern horse?

Explanation:

By observing the skeletal structures, skulls, and leg bones in the image, we can infer the evolutionary progression. The oldest fossil would be the one with the most primitive features. As evolution progresses, species develop more complex and specialized traits. The modern horse has a more developed and refined skeletal structure compared to its ancestors.

Answer:

• The oldest fossil: Mesohippus
• The fossil most like a modern horse: Equus