Megagametogenesis is the development of a megaspore into an embryo sac, which is the gametophyte - though a highly reduced one - stage in the life cycle of vascular plants. ==Eudicots== In eudicot plants, the entire process happens inside the ovule of a plant. The details of the process vary by species, but the process described here is common. Th...
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(from the article `angiosperm`) ...linear tetrad of megaspores. Three of the four megaspores degenerate, and the surviving one enlarges. The resulting megagametophyte produces the ...
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