Question

Explain the process of fertilisation in a flower.

Answer 1

Feritisation in plant Is the fusion of pollen grains,By The embryo sac(male gamete with ovary) and diophloid sac and triphloid sac.

Answer 2

Answer:

first the pollen grains fall on the stigma of a flower of same kind or other.this is called pollination. these pollen grains contain two nuclei one is tube nucleus other is germinative nucleus. tube nucleus forms pollen tube to a ovule of the ovary.then the germinative nucleus divides into two nuclei .these two nucleus travel along the pollen tube to the ovule there will be 3 cells at the beginning and also at the end at the beginning 3 cells 2 are helper cells one is female gamete cell . one of the nucleus from pollen tube fuses with the female gamete and forms diploid zygote,here one fertilization happens and  the other nucleus from the pollen tube fuses with the polar nucleus in the center of the ovule and forms triploid endospermic nucleus ,here second fertilization happens . so this is a double fertilization process. after this all the ovules forms as seeds and the ovary as the fruit. all the petals , sepals , stamen , style and stigma falls off.