Onion root tip under a microscope. The dark staining globs in the cells are chromosomes going through the steps of division to make the root tip grow. Photograph by John Alan Elson.
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This project has been funded wholly or in part by the United States Environmental Protection Agency under assistance agreement CE-98T25101 to the Bay Foundation of Morro Bay. The contents of this document do not necessarily reflect the views and policies of the Environmental Protection Agency, nor does the EPA endorse trade names or recommend the use of commercial products mentioned in this document.