Answer
a. gill supports
Work Step by Step
Fish jaws formed from structures called gill arches, which supported the gills of the fishes. By developing jaws, fish were able to capture and consume their prey more efficiently.
Biology: The Unity and Diversity of Life (14th Edition)
by Starr, Cecie; Taggart, Ralph; Evers, Christine; Starr, Lisa
Published by
Brooks/Cole Publishing Co.
ISBN 10:
1305073959
ISBN 13:
978-1-30507-395-1
Chapter 25 - Self-Quiz - Page 432: 3
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