Campbell Biology: Concepts & Connections (9th Edition)

Published by Pearson
ISBN 10: 0-13429-601-X
ISBN 13: 978-0-13429-601-2

Chapter 33 - Review - Page 680: 5

Answer

d. genes,membranes and enzymes

Work Step by Step

Plant hormones are chemical messengers that act by affecting the activities of genes,membranes and enzymes. For example,auxin acts on parts of DNA called as promoters,to switch off or on the nearby genes.
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