STUDY GUIDE: 52-54 AP Biology Reading Guide Chapter 22.2 & 22.3: Descent with Modification Name __________________________ Concept 22.2 Descent with modification by natural selection explains the adaptations of organisms and the unity and diversity of life Charles Darwin proposed that the mechanism of evolution is and that it explains how natural selection arise. What are Give two examples of adaptations. adaptations adaptations? Let’s try to summarize Darwin’s observations Cite examples that drive changes in species over time: Observation 1. Variations in traits exist. 2. These variations (traits) are heritable. 3. Species overproduce. 4. There is competition for resources; not all offspring survive. Explain the process of natural selection. Concept 22.3 Evolution is supported by an overwhelming amount of scientific evidence Use Figure 22.13 to explain how John Endler’s work with guppies demonstrated observable evolutionary change. What is the role of in inhibiting HIV reproduction? 3TC Explain the evolution of drug resistance to 3TC. Do antibiotics cause bacteria to become resistant? Explain your response. Evidence for Evolution Use the tree to the left to answer this question: Are crocodiles more closely related to lizards or to birds? Explain your response.
STUDY GUIDE: 52-54 AP Biology Reading Guide Chapter 22.2 & 22.3: Descent with Modification Name __________________________ Concept 22.2 Descent with modification by natural selection explains the adaptations of organisms and the unity and diversity of life Let’s try to summarize Darwin’s observations that drive changes in species over time: Observation Cite examples 1. Variations in traits exist. 2. These variations (traits) are heritable. 3. Species overproduce. 4. There is competition for resources; not all offspring survive. Charles Darwin proposed that the mechanism of evolution is natural selection and that it explains how adaptations arise. What are adaptations? Give two examples of adaptations. Explain the process of natural selection. Concept 22.3 Evolution is supported by an overwhelming amount of scientific evidence Use Figure 22.13 to explain how John Endler’s work with guppies demonstrated observable evolutionary change. What is the role of 3TC in inhibiting HIV reproduction? Explain the evolution of drug resistance to 3TC. Do antibiotics cause bacteria to become resistant? Explain your response. Evidence for Evolution Use the tree to the left to answer this question: Are crocodiles more closely related to lizards or to birds? Explain your response.
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