Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 28 - The Evolution of Seed Plants - 28.1 - Pollen, Seeds, and Wood Contributed to the Success of Seed Plants - 28.1 Recap - Learning Outcomes - Page 597: 2

Answer

Up until the development of pollen, many non-tracheophytes depended on water to disperse their "sperm" for fertilization. Pollen is a land adaptation that allows the male microgametophyte to travel through air to reach other plants. This freed the land plant and allowed it to develop away from bodies of water.

Work Step by Step

Up until the development of pollen, many non-tracheophytes depended on water to disperse their "sperm" for fertilization. Pollen is a land adaptation that allows the male microgametophyte to travel through air to reach other plants. This freed the land plant and allowed it to develop away from bodies of water.
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