©Mr. Comet’s Living Environment Laboratory Manual, 2005-2006, South Lewis High School, Turin, New York 13473. Permission is granted for not-for-profit educational use by certified teachers. Name: __________________________________ Date Completed:...
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©Mr. Comet’s Living Environment Laboratory Manual, 2005-2006, South Lewis High School, Turin, New York 13473. Permission is granted for not-for-profit educational use by certified teachers. Name: __________________________________ Date Completed: _____________________________ Class: ____________ Lab Minutes: _______________ Teacher: _______________________________ Using a Dichotomous Classification Key to Identify Common Freshwater Fish of New York State Special Thanks to Rick Marshall, Massena High School, Massena NY for his contributions to the re-creation of this lab experience. Background: A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys consist of a series of “either or” choices that lead the user to the correct name of a given item. "Dichotomous" means "divided into two parts". Therefore, dichotomous keys always give two choices in each step. Dichotomous k
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