Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 6 - Test Your Understanding - Level 1 - Knowledge/Comprehension - Page 125: 1



Work Step by Step

This is the correct answer because the other options are made up of single-membrane systems that are all connected. The chloroplast is a double membrane structure that we believe to have first been a prokaryotic cell that was "eaten" by a single celled eukaryote. This is the endosymbiotic theory. See concept 6.4 and also page 109 last paragraph.
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