Final answer:
The fertilized ovule develops into a seed, which contains the embryonic plant and stored nutrients. The ovary surrounding the seed turns into a fruit, aiding in seed dispersal.
Step-by-step explanation:
The fertilized ovule gives rise to the seed. After the process of pollination and fertilization, a diploid zygote forms within the ovule, which is located in the plant's ovary. This zygote then develops into an embryo, and eventually, the ovule transforms into the seed. The seed contains not only the embryonic plant but also a nutrient supply to nourish the embryo until it can start photosynthesizing on its own. As the seed develops, the walls of the ovary thicken and the entire ovary may develop into a fruit, which serves multiple purposes including the protection of the seeds and facilitating their dispersal by various means (wind, water, animals).