Answer
C.
Work Step by Step
This is because the starch grains in the root are the statoliths normally needed for gravitropism. Gravitropism without them would invalidate the current understanding of how this works.
Campbell Biology (11th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0-13409-341-0
ISBN 13:
978-0-13409-341-3
Chapter 39 - Test Your Understanding - Level 2 - Application/Analysis - Page 869: 7
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