Here's why:
* Ovule: The ovule contains the female gametophyte (the egg cell) and is located within the ovary of the flower.
* Fertilization: When pollen (containing the male gametophyte) lands on the stigma of the flower, it grows a pollen tube down to the ovule. The sperm from the pollen fuses with the egg cell inside the ovule, resulting in fertilization.
* Seed Development: After fertilization, the ovule develops into a seed. The seed contains the embryo (formed from the fertilized egg) and a food source (endosperm) to nourish the embryo.
Let me know if you have any other questions!