EA/d .Process of reproduction Ovary Microsporocyte In plants (within anther) other cell Meiosis (Mature sporophyte) Meiosis (within ovule (Double fertilization Degenerate Tetrad (three times) Synergids I(female Generative cell Tube cell Germinating pollen grain Zygote→ Embryo(2n) Tube Fig. 2.1 Steps in sexual reproduction in seed plants Of these only one lowermost megaspore i. e farthest from micropyle develops further while other three degenerate. The surviving functional megaspore undergoes three successive nuclear divisions(mitosis) to develop an 8-nucleate embryo-sac or the female gametophyte. The eight nuclei in the embryo-sac move in such a way that three rest at the micropyle end. One of these is egg(female gamete)and other two are•Process of reproduction In Plants (Double fertilization)