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AP Biology Reading Guide CHAPTER 22: Descent with Modification: A Darwinian View of Life Directions 1) Before you read the chapter, decide whether you think each statement is true or false. Circle you choice. If you are uncertain, write in a question mark and circle it. 2) As you read the chapter, identify whether each statement is true or false according to what you have read. Circle the answer and note the evidence in complete sentences. 3) Was your thinking changed or reinforced by what you read? If so, in what way? 4) Be prepared to share your answers with the class. Before Reading True False Statement True False 2. Geologists Hutton & Lyell perceived that changes in Earth’s surface can result from quick, discontinuous actions still operating at the present time. Evidence: True False True False 3. Lamarck hypothesized that species evolve, and the mechanisms he proposed are well supported by evidence. Evidence: True False True False 4. Darwin’s voyage on the HMS Beagle provided much of the evidence for his theory of natural selection. After returning to England he refined his theory and published it in 1859 after learning Wallace had the same idea. Evidence: True False 1. Darwin’s theory that the diversity of life has arisen from fewer ancestral species through natural selection was a radical departure from the prevailing views of Western culture. Evidence: After Reading True False True False 5. Darwin recognized that there are heritable variations in populations and some of these variations are better suited to a particular environment. Because organisms tend to produce many more offspring than the environment can support, there is competition for resources, and those better suited to a particular environment have greater survival and reproductive success. Over time this process of natural selection results in adaptation of organisms to their environment. Evidence: True False True False 6. Scientists have never observed natural selection leading to adaptive evolution in the environment or laboratory. Evidence: True False True False 7. Evolutionary theory explains many kinds of observations, including structural and molecular similarities, geographic distribution of organisms, and the fossil record. Evidence: True False True False 8. Darwin’s theory of evolution by natural selection integrates diverse areas of biological study and stimulates many new research questions. Evidence: True False