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1. Natural SelectionThe Evolution of Clamys sweetus
2. Question:Is there any survival advantage to having a brown shell? Indicate that this is one of the questions that was asked at the science conference. Ask students to discuss what they might need to know in order to answer this question.Indicate that this is one of the questions that was asked at the science conference. Ask students to discuss what they might need to know in order to answer this question.
3. Natural Selection in Action