Campbell Biology (11th Edition)

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

Chapter 35 - Test Your Understanding - Level 1 - Knowledge/Comprehension - Page 781: 3



Work Step by Step

C. is correct since these two kinds of secondary xylem are distinguished by their color, darker for heartwood and lighter for sapwood.
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