A fruit is a ripened ovary of a flowering plant. Inside a female flower, is the reproductive organ called the pistil. It contains the sticky part on top called the stigma, a long style and the bottom portion is the ovary. Inside are tiny ovules containing eggs. When these are fertilized by the sperm transmitted by pollen grains from the male anther, they become seeds containing the embryo plant and a food supply. Technically, anything with seeds is a fruit, not a vegetable. Tomatoes, cucumbers, eggplants are all called vegetables, but they are actually all fruits. Vegetables usually are made of a plant's stem, flower or root. Broccoli is the stem and flower of a plant, onions are bulbs, carrots are roots. The produce section in a supermarket usually categorizes sweet tasting plant products as fruits and vegetables are more savoury or not as sweet. However, biologically, if it contains seeds, it is a ripened ovary also known as a fruit.