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This lesson is an experimental hands-on activity in which students determine the toxic dose of a chemical that will inhibit seed germination in Brassica rapa, a relative of cabbages and mustards. Neither the teacher nor the students are provided with a set procedure to conduct the investigation. Rather, the lesson provides a set of guidelines forcing students to brainstorm ideas, contribute their thoughts, and determine through dialogue with their peers how a hypothesis can be tested. Thus, through this activity, students will gain an understanding of toxicology as well as the basic principles of doing.
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