Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 32 - Deuterostome Animals - 32.3 - Chordates Have a Dorsal Nerve Cord and a Notochord - 32.3 Recap - Learning Outcomes - Page 695: 2

Answer

The phylogenetics of a hagfish reveal that it lacks a vertebral column, thus differing from a lamprey. Since they do not have separate, joined vertebrae and have a cartilaginous skeleton, many biologists assert that hagfish do not qualify as true vertebrates.

Work Step by Step

The phylogenetics of a hagfish reveal that it lacks a vertebral column, thus differing from a lamprey. Since they do not have separate, joined vertebrae and have a cartilaginous skeleton, many biologists assert that hagfish do not qualify as true vertebrates.
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