Campbell Biology (11th Edition)

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

Chapter 27 - 27.1 - Concept Check - Page 576: 3

Answer

A possible hypothesis is that the thylakoid membranes of chloroplasts resemble the membranes of cyanobacteria because chloroplasts evolved from a cyanobacterium endosymbiont.

Work Step by Step

Note that cyanobacteria also utilize photosynthesis and that plastids such as chloroplasts are believed to be incorporated due to endosymbiosis.
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