Campbell Biology (11th Edition)

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

Chapter 36 - 36.4 - Concept Check - Page 796: 4


Water loss, whether due to transpiration or perspiration, requires a lot of heat to break the hydrogen bonds between water molecules in the liquid state. This, in turn, means that a lot of heat is lost with evaporation, cooling the organism from which the water evaporates.

Work Step by Step

Review Ch. 3 and think about how sweating makes you feel— cooler when too hot. Transpiration has the same effect for plants for the same reasons of physics and chemistry.
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