Answer
b. environmental conditions influence xylem cell size.
Work Step by Step
The size of xylem cells are influenced by the environmental conditions and this leads to the occurrence of tree rings.
Biology: The Unity and Diversity of Life (14th Edition)
by Starr, Cecie; Taggart, Ralph; Evers, Christine; Starr, Lisa
Published by
Brooks/Cole Publishing Co.
ISBN 10:
1305073959
ISBN 13:
978-1-30507-395-1
Chapter 27 - Self-Quiz - Page 467: 14
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