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


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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