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 27 - Self-Quiz - Page 467: 12


a. apical meristems

Work Step by Step

Primary growth causes roots and shoots to become longer. Apical meristems at the tips of shoots and roots are the origin of this lengthening process, which involves the lengthening of differentiating cells under the apical meristem. Lateral meristems allow the thickening, or secondary growth, of older shoots and roots. These lateral meristems consist of the cork cambium and the vascular cambium.
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