Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 28 - Self-Quiz - Page 481: 11



Work Step by Step

Stomata open because guard cells swell up with water. When the guard cells become engorged with water, they bend, thus forming an opening for gas exchange. Water is lost when the stomata are open.
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