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20 Cards in this Set
- Front
- Back
pollination
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the transfer of pollen for the anther to the stigma
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fertilization
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the formation of a seed by the uniting of a sperm nucleus from a pollen grain with an egg cell
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nectar
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a sweet liquid usually stored in the base of the blossom
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self-pollination
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when there is such an excess of pollen that the flower pollinates itself
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cross-pollination
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when pollen is carried from one plant to another
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pollen tube
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a tube that begins to grow from the pollen's location on the stigma, through the style and into the ovary
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sperm nucleus
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what unites with the egg cell to produce a seed
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egg cell
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the cell in the ovule which unites with sperm nucleus to produce a seed
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the three parts of a seed
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ann embryo, an endosperm, and a seed coat
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embryo
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a miniature plant made up of a plumule and a radicle
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plumule
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a tiny shoot that will become the stem and leaves of a plant
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radicle
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a small root that will develop into the root system
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cotyledons
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structures desgined for food absorption and storage
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endosperm
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the tissue which surrounds the embryo and provides nutrition
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seed coat
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a tough outer covering
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germination
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the early growth of a seed
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fruit
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anything that form in the ovary of a flower
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dispersal
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scattering or distributing of seeds after they are mature
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mechanical dispersal
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occurs when the ripened fruit bursts open and scatters the seed some distance from the plant
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agent dispersal
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occurs when animals, wind, or water helps with seed dispersal
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