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Chapter 25 Slides Sections 1-3

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1 st Endosymbiosis<br />

• Evolution of eukaryotes<br />

<br />

<br />

<br />

origin of mitochondria<br />

engulfed aerobic bacteria, but<br />

did not digest them<br />

mutually beneficial relationship<br />

• natural selection!<br />

internal membrane<br />

system<br />

aerobic bacterium<br />

mitochondrion<br />

Endosymbiosis<br />

Ancestral<br />

eukaryotic cell<br />

AP Biology<br />

Eukaryotic cell<br />

with mitochondrion

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