embryo sac - Hutchinson encyclopedia article about embryo sac Printer Friendly
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embryo sac

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embryo sac

Large cell within the ovule of flowering plants that represents the female gametophyte when fully developed. It typically contains eight nuclei. Fertilization occurs when one of these nuclei, the egg nucleus, fuses with a male gamete.



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Endosperm is also a richer source of food for developing plants than embryo sac cells, Friedman says.
Clues to the origins of flowering plants by Ezzell, Carol / Science News
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