In this digital version of the classic microscope lab, you will classify cells from the tip of an onion root into the appropriate phases of the cell cycle, and then count up the cells found in each phase. You can use those numbers to predict how much time a dividing cell spends in each phase.

This resource is part of the Biology Links for One Laptop Per Child course which contains units on Exploring Life; The Cell; Genetics; Mechanisms of Evolution; The Evolutionary History of Biological Diversity; Plant Form and Function; Animal Form and Function; Ecology; and Astrobiology.

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