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I. Origins<br />
B. 3.5 billion years ago<br />
C. FIRST LIFE FORMS were:<br />
Archaebacteria, or ancient bacteria<br />
(how do we know this?)<br />
early Earth atmosphere had almost no O2 O<br />
D. Eubacteria is true bacteria<br />
(Eu Eu = true) true<br />
�� Eukaryote Eukaryote<br />
= true nucleus
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