This material is based on work supported by the National Science Foundation under grant numbers DRL-1418136 and DRL-1222869. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. We are grateful to the many professionals who contributed to this project as well as the thousands of students who participated throughout development and testing of the unit and assessment items. A full list of acknowledgments, schools, and locations can be found at https://learn.genetics.utah.edu/content/evolution/credits. We are also grateful to the journal reviewers for their thoughtful, thorough, and gracious feedback throughout the entire revision process. Monitoring editor Tessa Andrews provided expert guidance. Her time and efforts contributed greatly to our work.
