Answer
b.
Work Step by Step
Stimuli trigger reactions in organisms. Examples of stimuli are chemicals, light, and sounds. Organisms have sensory organs that pick up these stimuli to be processed by the nervous system.
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 28, Animal Systems II - Assessment - 28.1 Response - Understand Key Concepts/Think Critically - Page 834: 1
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