Chapter 25 Slides Sections 1-3

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Relative turbidity, an index of vesicle number Figure <strong>25</strong>.3 0.4 0.2 Precursor molecules only Precursor molecules plus montmorillonite clay 0 0 20 40 60 Time (minutes) (a) Self-assembly Vesicle boundary 1 m AP Biology (b) Reproduction 20 m (c) Absorption of RNA
Self-Replicating RNA and the Dawn of Natural Selection • The first genetic material was probably RNA, not DNA • RNA molecules called ribozymes have been found to catalyze many different reactions For example, ribozymes can make complementary copies of short stretches of RNA AP Biology © 2011 Pearson Education, Inc.
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
Page 7 and 8: Conditions on early Earth AP Biolog
Page 9 and 10: Stanley Miller University of Chicag
Page 11 and 12: Abiotic Synthesis of Macromolecules
Page 13: • Adding clay can increase the ra
Page 17 and 18: The Fossil Record • Sedimentary r
Page 19 and 20: • Few individuals have fossilized
Page 21 and 22: Fraction of parent isotope remainin
Page 23 and 24: Concept 25.3: Key events in life’
Page 25 and 26: Table 25.1 AP Biology
Page 27 and 28: Table 25.1b AP Biology
Page 29 and 30: Figure 25.7-3 Cenozoic Humans Colon
Page 31 and 32: Figure 25.UN03 1 4 2 3 AP Biology A
Page 33 and 34: • By about 2.7 billion years ago,
Page 35 and 36: Figure 25.UN04 1 4 AP Biology Singl
Page 37 and 38: First Eukaryotes • Development of
Page 39 and 40: 2 nd Endosymbiosis • Evolution of
Page 41 and 42: Figure 25.UN05 1 4 2 3 AP Biology M
Page 43 and 44: Figure 25.UN06 Animals 1 4 2 3 AP B
Page 45 and 46: AP Biology
Page 47 and 48: Figure 25.10 Sponges Cnidarians Ech
Page 49 and 50: The Colonization of Land • Fungi,
Page 51: Is there life elsewhere? Does it lo

Chapter 25 Slides Sections 1-3

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