Question

How do scientists place horse ancestor fossils in the correct order?

(1 point)
Responses

By the size and number of their foot bones.
By the size and number of their foot bones.

By the total length of the horse's tail.
By the total length of the horse's tail.

By the color of the discovered fossil bones.
By the color of the discovered fossil bones.

By the type of plants the horse once ate.

A fossil is found with features of both a dinosaur and a bird. What is this type of discovery and why is it important?

(1 point)
Responses

It is a transitional fossil that connects two groups.
It is a transitional fossil that connects two groups.

It is an ancestor fossil that is the oldest one known.
It is an ancestor fossil that is the oldest one known.

It is a vestigial fossil that shows a lost feature.
It is a vestigial fossil that shows a lost feature.

It is a modern fossil that looks like a living bird.

Answer 1

1) By the size and number of their foot bones.
(early horses were small with several toes; later ones larger with fewer toes/one hoof)

2) It is a transitional fossil that connects two groups.
(It shows traits intermediate between dinosaurs and birds, providing evidence of evolutionary change.)