Describe the process of fertilisation in a flower with a labelled diagram?what happens to the fertilised egg this formed?

Fertilization involves the fusion of the male and the female gamete.

In flowering plants during fertilization, pollens from male flower are dropped on the stigma of female flower. Inside the pollen grain, two pollen nuclei (male gametes) are formed which gradually enter inside the ovule through pollen tube. Out of the two sperm nucleus, one sperm nucleus fuses with the egg nucleus to form a zygote ( process is called   syngamy   ) and another fuses with polar nuclei to form endosperm ( process is called   triple fusion   ). Since two kinds of fusion—syngamy and triple fusion—take place, the process is known as   double fertilization.