Arun Sampathkumar and Elliot Meyerowitz, California Institute of Technology
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In plants, as in animals, stem cells can transform into a variety of different cell types. The stem cells at the growing tip of this Arabidopsis plant will soon become flowers. Arabidopsis is frequently studied by cellular and molecular biologists because it grows rapidly (its entire life cycle is only 6 weeks), produces lots of seeds and has a genome that is easy to manipulate.
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