Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078024269
ISBN 13: 978-0-07802-426-9

Chapter 24 - Flowering Plants: Structure and Organization - Engage - Thinking Scientifically - Page 455: 4

Answer

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Work Step by Step

Lenticels are small pores on the surface of plant stems or roots that allow for gas exchange between the internal tissues and the external environment. In potatoes, lenticels are commonly found on the tubers, which are underground storage organs. When potatoes are harvested from wet soil, the soil can become compacted around the tubers and reduce the amount of oxygen that reaches the internal tissues. This lack of oxygen can lead to anaerobic conditions, which can be detrimental to the health and growth of the tubers. The presence of large lenticels on potato tubers harvested from wet soil can be an adaptive response to this stressful environment. By increasing the size and number of lenticels, the tubers can facilitate greater gas exchange with the external environment, allowing for increased oxygen uptake and the removal of waste gases like carbon dioxide. This can help to maintain healthy aerobic conditions within the tubers and improve their overall growth and development. In summary, the presence of large lenticels on potato tubers harvested from wet soil is an adaptive response to the stressful conditions of low oxygen availability. By increasing gas exchange, the potato plants can maintain healthy aerobic conditions within their underground storage organs, allowing for optimal growth and development.
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