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All NRs , GRs , and Is must be changed to a letter grade or be otherwise cleared from a student ’ s record in order to graduate . Individual chapters consider such issues as the evolution of learning and its influence on behavior ; the effects of cognitive mechanisms on the evolution of signaling behavior ; how neurobiological and evolutionary processes have shaped navigational activities ; functional and mechanical explanations for altered behaviors in response to changing environments ; how foragers make decisions and how these decisions are influenced by the risks of predation ; and how cognitive mechanisms affect partner choice . BSE degrees require 40 course units ( and in a few cases 41 cu ’ s ) and are designed to be completed in four years . The insurance and risk management concentration examines the techniques useful to corporations , organizations and individuals in minimizing the potential financial losses arising from their exposure to risk . Graduating with a BS in bio in 2 weeks !