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Prerequisite: BIOL 225 with a minimum grade of "C-"; other prerequisites dependent on topic; or consent of instructor Various specialized or experimental offerings in environmental biology will be offered from time to time as either three- or four-credit courses, or short courses of one or two credits. Each course may be lecture, laboratory or combined lecture and laboratory as appropriate. Biology majors may combine three short courses to equal one elective. Repeatable for different topics. Offered as topics arise.