ECON 2010 Lecture 2: Section 2: Plant Growth
3 Apr 2016
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Document Summary
Angiosperms - vascular plants that have seeds within fruits. (flowering plants) Seeds - reproductive structures that are produced by flowering plants and other seed plants. Usually as the result of secual reproduction. Contains embryos that develop into young plants upon germination. Alternation of generations - sexual reproductions involves 2 multicellular stages: Plant embryo is a young sporophyte that lies dormant within a seed with a supply of stored food and a protective seed coat. Dispersed seeds may stay dormant for long periods of time until conditions are favorable. Plant body is composed of three types of organs. Shoot system - aerial portion of plant body. Root system - aggregate of plant roots. Endosperm - tissue in seeds that provides food for early embryo growth. Radicle - embryonic root, provides water and minerals for growth. Seedlings and mature plants produce new tissues in areas called meristems. Meristems is a region of undifferentiated cells that produce new tissues.
