The process by which gametes combined to form a zygote is called

a) parthenogenesis

b) mitosis

c) meiosis

d) fertilization

D) fertilization

Explanation:

Fertilization is the name given to the fusion of male and female gametes. By themselves, female egg cells - - called ova - - and male sperm cells cannot grow and divide. However, once a sperm cell breaks through the egg cell membrane, the genetic material combines and the new organism begins to grow and develop as a living thing.