Conflicting Selection Pressures is the second lesson from Innovative Technology in Science Inquiry, in a three lesson series that leads students to make sense of evolution. This lesson is meant to be used after A Selection Pressure which contains the anchoring phenomena and a set of questions (located in the teacher guide), but can also be used as a stand alone activity. This lesson examines what can happen to a population when a trait can help an organism in one way, but hinder it in another. Students then engage in discussion that leads them to gather data on a population of sheep (also used in lesson one). Students investigate population growth under different conditions, using an interactive simulation, to gather data in order to create an explanation for evolution. This lesson is designed to be done individually, however it could be done in groups depending on device availability. The teacher has the ability to set up a class and assign the lesson through a portal on the ITSI website (requires teacher to sign up for the website for free).
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