Campbell Biology (11th Edition)

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

Chapter 32 - 32.3 - Concept Check - Page 680: 1


A clade is a group of organisms which includes all of the descendants and only the descendants of a common ancestor (example: Animal Kingdom). A grade is a group of organisms which share some important and interesting common characteristics (example: Protostome animals, which are the clade of all animals above the most basic Metazoans minus the Deuterostomes). A grade might be some part of a clade useful to study as a group.

Work Step by Step

See p. 675 for the definitions of these terms, and then look at Fig. 32.11 and try to identify examples of each to use as examples in your answer.
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