Chapter 25 Slides Sections 1-3
Chapter 25 Slides Sections 1-3
Chapter 25 Slides Sections 1-3
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Photosynthesis and the Oxygen<br />
Revolution<br />
• Most atmospheric oxygen (O 2 ) is of biological<br />
origin<br />
• O 2 produced by oxygenic photosynthesis<br />
reacted with dissolved iron and precipitated<br />
out to form banded iron formations<br />
AP Biology<br />
© 2011 Pearson Education, Inc.