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  • blind cave fish
  • Graphic of structured decision making process

    Using Structured Decision Making to Explore Complex Environmental Issues

    Learning Objectives
    Students will be able to:
    1. Describe the process, challenges, and benefits of structured decision making for natural resource management decisions.
    2. Explain and reflect on the role of science and scientists in structured decision making and how those roles interact and compare to the roles of other stakeholders.
    3. Assess scientific evidence for a given management or policy action to resolve an environmental issue.
  • Enzymatic avocado browning is driven by polyphenol oxidase. Mashed avocado pulp is bright green but turns dark brown over the course of two hours at room temperature in the presence of air and salt. This reaction can be accelerated or inhibited by more than 20 different testable reagents, allowing students to explore experimental design.

    The Avocado Lab: An Inquiry-Driven Exploration of an Enzymatic Browning Reaction

    Learning Objectives
    Students will be able to:
    • develop a testable research question and supportive hypothesis regarding the browning of damaged avocado flesh caused by the activity of avocado polyphenol oxidase (aPPO).
    • design and execute a well-controlled experiment to test aPPO hypotheses.
    • evaluate qualitative enzyme activity data.
    • create a figure and legend to present qualitative data that tests multiple hypotheses and variables.
    • search for and correctly cite primary literature to support or refute hypotheses.
    • know the role of reducing reagents, pH, chelators, and temperature in reactions catalyzed by aPPO.
    • explain why the effects of salt and detergent differ for aPPO experiments conducted in situ
    • (in mashed avocado flesh) as compared to in vitro (on purified protein).
    • discuss how substrate and cofactor availability affect aPPO reactions.
    • describe how endogenous subcellular organization restricts aPPO reactions in a healthy avocado.
    • evaluate food handling practices for fruits expressing PPO.
  • Building a Model of Tumorigenesis: A small group activity for a cancer biology/cell biology course

    Learning Objectives
    At the end of the activity, students will be able to:
    • Analyze data from a retrospective clinical study uncovering genetic alterations in colorectal cancer.
    • Draw conclusions about human tumorigenesis using data from a retrospective clinical study.
    • Present scientific data in an appropriate and accurate way.
    • Discuss why modeling is an important practice of science.
    • Create a simple model of the genetic changes associated with a particular human cancer.