Plant Structure6 - Plant Structures The Seed The seed which surrounds the plant embryo and protects it from desiccation in the uncertain conditions

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Plant Structures The Seed The seed, which surrounds the plant embryo and protects it from desiccation in the uncertain conditions of a terrestrial environment, is one of the adaptations that has allowed plants to thrive as they gradually moved from water to land. Each seed consists of an embryo, food source, and protective outer coat; it can lie dormant for some time before germinating, waiting until environmental conditions are right. Gymnosperm Seeds The two classes of seed-bearing plants are gymnosperms (conifers) and angiosperms (flowering plants). The composition of the seed varies by type of plant. As discussed in Plant Classification, Gymnosperms, the gymnosperm ovule develops into the seed after fertilization takes place. The tissue of the female gametophyte within the ovule, where the egg cell was generated, surrounds the developing embryo and becomes its food source. The integument (outer surface) of the ovule becomes the seed coat.
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This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.

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Plant Structure6 - Plant Structures The Seed The seed which surrounds the plant embryo and protects it from desiccation in the uncertain conditions

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