Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0-07802-426-9
ISBN 13: 978-0-07802-426-9

Chapter 33 - The Lymphatic and Immune Systems - Assess - Page 639: 3

Answer

C.

Work Step by Step

True adaptive immunity, involving the production of a large number of diverse antigen receptors, first evolved in jawed vertebrates.
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