This set of questions allows students to investigate the process and evidence for the endosymbiotic theory using a wonderful web tutorial from Sumanasinc.com. I have students work through the tutorial and questions in pairs, and then do a "debriefing" where each pair shares their answer to one question. I allow the class to judge whether each response is correct and/or complete. I spend a lot of time on the last question, so that the class can develop a unique definition of the endosymbiotic theory in their own words.
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