Campbell Biology (11th Edition)

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

Chapter 50 - 50.4 - Concept Check - Page 1123: 2

Answer

Smells consist of small particles in the air, which may be very few in number.

Work Step by Step

Due to the sparse nature of most scent particles associated with a given smell, it is necessary for the olfactory system to be highly sensitive to them.
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