Angiosperm Fertilization In angiosperms, the female reproductive organ is the pistil and is present in middle of the flower. The male
gametophyte is the pollen grains as in gymnosperms. Pollinators like insects other animals help in
fertilization of flowering plants.
Double fertilization takes place in angiosperms. The pollen tube penetrating into the ovule releases two
sperm cells. One sperm cell fuses with the egg to form a diploid zygote. The other sperm cells fuses two
polar nuclei to form a triploid nucleus. The triploid nucleus forms the endosperm and nourishes the
developing embryo. The ovary containing the ovules develops into a fruit after fertilization.
