This organism is supposed to be the staring point for all vertebrates. It's believed that you can trace the evolutions of vertebrates from over 250 million years ago. These creatures are only about 5 centimeters long, and lack any sort of limbs. One body part they have in common with modern day vertebrates is a nerve cord similar to a spine, that runs through their bodies. They can also be found in different places around the world.
No comments:
Post a Comment