exercise 5 - Vivian Mai-Tran October 10, 2006 Tuesday 9-1...

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Vivian Mai-Tran October 10, 2006 Tuesday 9-1 Lab Exercise 5 1. There are three regions with respect to cell division and differentiation—zone of cell division, elongation, and differentiation. The root cap is composed of differentiated cells that protect the apical meristem against rough soil. Between the root cap and the apical meristem, the closer you get to the division line, the less differentiated the cells are. This means that the root cap cells closest to the soil are differentiated, while the root cap cells closer to the meristemetic region are undifferentiated. The apical meristem shows the most mitotic activity. All stages of mitosis can be seen in this area—prophase, metaphase, anaphase, telophase. Next is the zone of elongation, where cell division ceases and there is rapid cell growth. The cells vary in size and are bigger than the cells in the cell division stage. Then, the zone of differentiation or specialization is next, where cells mature, such as a root hair. These cells have more distinction between each layer from the outside toward the center of the root. 2.
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This note was uploaded on 02/22/2010 for the course BIO 50100 taught by Professor Brand during the Fall '09 term at University of Texas at Austin.

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exercise 5 - Vivian Mai-Tran October 10, 2006 Tuesday 9-1...

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