Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 33 - Test Your Understanding - Level 2 - Application/Analysis - Page 715: 5



Work Step by Step

A. is wrong since the Porifera are not eumetazoans, and B. is wrong since these two clades branch off much higher than the most recent common ancestor of the eumetazoans. D. can be eliminated since Deuterostomia is part of Bilateral, not a separate clade.
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