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Introduction to Biological Anthropology – ANTH 5 – Spring 2020Problem Set # 1 – AdaptationAll slide numbers (below) refer to the video lecture file, not the in-class file.1.As discussed in Lecture 1, the beaks of the Galapagos finches changed during the 1976-1977drought; the distribution shifted to the right and they became deeper (stouter) on average, asshown on slide 51 of that lecture.A.How did that happen? Describe the steps of the process that caused this population changein as much detail as necessary to make it clear how the beaks got deeper. (Hint: During thedrought, what happened to finches with different beak depths?)
B.Darwin’s 5thlogical step concerns the similarity between parents and offspring. Why isthat the step critical (would favorable types increase in frequency if step 5 were false ormissing)?

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