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Unformatted text preview: descriptive names are only partially correct in describing the activities taking place in each area. These regions, starting at the tip and moving upwards towards the stem, are the root cap , zone of active cell division , zone of cell elongation , and zone of maturation . The first two are compacted in the first centimeter or less of the axis with the latter two no more than 45 centimeters from the tip. Only the root cap and the cell division regions actually move through the soil . After cells start to elongate and mature, no further extension takes place, and the root is stationary for the rest of its life. Figure 1...
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- Fall '08