Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 35, Immune System and Disease - Assessment - 35.2 Defenses Against Infection - Understand Key Concepts/Think Critically - Page 1030: 10



Work Step by Step

Options a., b., and c. are incorrect. All of these are defenses against pathogens; however, only option d., skin, is a widespread and nonspecific defense against pathogens.
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