If there are numerous, simple, superior ovaries within a single flower, the fruit is called an aggregate fruit, e.g., blackberries. Multiple fruits involve fusion of many fruits from numerous separate flowers. Composition of fruits Fleshy fruits have evolved to attract animals that eat them and disseminate the seeds. The fleshy part tends to consist of flavored sugar solutions without too many nutrients. The avocado and olive are exceptions.
Fruits are good sources of water soluble vitamins.
See table 4-3, p. 92. Seeds are quite different in composition. They are often protected by hard shells, seed coats, and toxic compounds. They are usually high in nutritional energy. See table 4-4.