This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Fertilization is the fusion of male and female gamete nuclei. It takes place both in flowers and humans. 
Fertilization in plants takes place when the pollen grains of one flower fuses with the ovary of another flower. The pollen grains, on the male plant itself develops in it two nuclei called generative nucleus and tube nucleus. The generative nucleus on entering the stigma divides into two sperm nuclei and the tube nucleus disintegrates.
In humans when two or more cells combine together it is called fertilization. The two or more cells combine to form a single nuclei which is called zygote.
*Fertilsation or fertilization is the fusion of gametes to initiate the development of a new individual organism.
*In animals, the process involves the fusion of an ovum with a sperm, which eventually leads to the development of an embryo.
*Depending on the animal species, the process can occur within the body of the female in internal fertilisation, or outside .
* The cycle of fertilisation and development of new individuals is called sexual reproduction.