Answer:
After pollination occurs, the male gamete (sperm cell) is carried from the pollen grain to the female gamete (egg cell) within the ovule. The pollen tube grows from the pollen grain down the style and into the ovary, where it penetrates the micropyle of the ovule.
The tip of the pollen tube releases digestive enzymes that help it penetrate the female gametophyte (the tissue within the ovule that contains the egg cell) and the egg cell membrane. The sperm cell then moves through the pollen tube and fuses with the egg cell, resulting in the formation of a zygote.
This process is known as fertilization, and it marks the beginning of seed development. The zygote will develop into an embryo, which will then grow into a seed. The ovule will also develop into a seed coat, which will protect the embryo and its stored nutrients.