As the seed develops, the walls of the ovary in which it forms thicken and form the fruit, enlarging as the seeds grow. Eggplants, zucchini, string beans, and bell peppers are all technically fruit be...As the seed develops, the walls of the ovary in which it forms thicken and form the fruit, enlarging as the seeds grow. Eggplants, zucchini, string beans, and bell peppers are all technically fruit because they contain seeds and are derived from the thick ovary tissue. Some fruit are developed from ovaries, while others develop from the pericarp, from clusters of flowers, or from separate ovaries in a single flower.
