Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 40 - Sensory Systems in Plants - Figure 40.8 - Inquiry Question: 1

Answer

The highest concentration of auxin should be found where it is produced, since it signals via gradients which decline from those embryonic parts, like primary meristems and embryos, which produce it.

Work Step by Step

The key here is the gradients. Auxin should be in its highest concentration where it originates since gradients drop off from their source just as light becomes less intense as one moves back from a lightbulb.
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