Q: The earliest vertebrates were jawless what?


Read this paragraph and choose the correct option from the provided answers:

The earliest vertebrates were jawless fish. They evolved about 550 million years ago. They were probably similar to modern hagfish (see Table above ). The tree diagram in Figure below summarizes how vertebrates evolved from that time forward.

 Choices:

- mammals

- dinosaurs

- reptiles

- fish


A:
fish