The life cycle of a flowering plant can be summarized as follows: The pollen grain germinates. The generative cell of the pollen grain forms two sperm cells. One sperm fertilizes the egg cell and the other fertilizes two polar nuclei in the embryo sac.  The fertilized ovule forms the seed while the ovary forms the fruit.  Under the right conditions, the seed germinates and forms a new plant individual. The mature individual produces flowers and the cycle begins again.