Humans, mice, and giraffes have seven vertebrae in their necks. What can scientists conclude from this observation?

(1 point)
Responses

Each animal independently evolved this trait.
Each animal independently evolved this trait.

All vertebrates have seven vertebrae in their necks.
All vertebrates have seven vertebrae in their necks.

These animals descended from a common ancestor.
These animals descended from a common ancestor.

Humans, mice, and giraffes have the same number of bones.

1 answer

Based on the observation that humans, mice, and giraffes all have seven vertebrae in their necks, scientists can conclude that:

These animals descended from a common ancestor.

This conclusion is supported by the idea that similar traits across different species often indicate a shared evolutionary history.