Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 21 - Self-Quiz - Page 353: 6



Work Step by Step

Like land plants and red algae, green algae have chloroplasts that evolved from cyanobacteria, single-celled organisms that make their own food through the process of photosynthesis. This transformation from cyanobacteria into chloroplasts was the result of endosymbiosis, the process by which a single-celled organism lives inside another single-celled organism, and the two organisms become dependent on one another for survival.
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