angiorepro213-page3 - Flowering Plant Reproduction 3 As we...

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Flowering Plant Reproduction - 3 As we discuss the processes of sexual reproduction and seed development in flowering plants, the phylum, Anthophyta, you will note that many processes are similar to those which occur in animal development, studied in Biology 211 and 212, such as cell division and differentiation. However, in some significant ways plant growth and development is very different from animal growth: In plants, mitosis is restricted to special areas of the embryo and growing plant called meristems. Meristems formed in the early embryo are retained throughout the lifetime of a plant at growing tips. Plant cells do not move and migrate. Cells have fixed positions. Change in plant shape is determined by increases in number of cells and elongation. Cell differentiation proceeds according to the cell's position within the embryo, or within shoot or root meristem regions. Most plants have open growth, so that some parts of the plant are always in an embryonic stage of development, and new parts are added to the plant
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