Chapter 25 Slides Sections 1-3

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Timeline AP Biology • Key events in evolutionary history of life on Earth 3.5–4.0 bya: life originated 2.7 bya: free O 2 = photosynthetic bacteria 2 bya: first eukaryotes
Figure <strong>25</strong>.7-3 Cenozoic Humans Colonization of land Animals Origin of solar system and Earth Multicellular eukaryotes 1 Proterozoic 4 Archaean 2 3 AP Biology Single-celled eukaryotes Prokaryotes Atmospheric oxygen
Page 1 and 2: “…sparked by just the right com
Page 3 and 4: Concept 25.1: Conditions on early E
Page 5 and 6: • In the 1920s, A. I. Oparin and
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Page 27: Table 25.1b AP Biology
Page 31 and 32: Figure 25.UN03 1 4 2 3 AP Biology A
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Chapter 25 Slides Sections 1-3

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