Biology (11th Edition)

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

Chapter 38 - Plant Nutrition and Soils - Figure 38.6 - Inquiry Question: 1

Answer

The source of most of the mass in a large tree trunk is the atmosphere, since the trunk is mostly cellulose and other carbohydrate polymers.

Work Step by Step

Those polymers are made via photosynthesis and following steps, with the initial material coming from atmospheric carbon dioxide.
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