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Chapter 25 Slides Sections 1-3

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Protocells<br />

• Replication and metabolism are key properties<br />

of life and may have appeared together<br />

• Protocells may have been fluid-filled vesicles<br />

with a membrane-like structure<br />

• In water, lipids and other organic molecules<br />

can spontaneously form vesicles with a lipid<br />

bilayer<br />

AP Biology<br />

© 2011 Pearson Education, Inc.

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