After fertilization, the ovary of the flower is stimulated. The uterus grows and changes in its various parts. As a result, the uterus grows. The wall of the uterus forms the placenta. If the ovary of each flower of an inflorescence develops into a fruit, it is called simple fruit or single fruit. Mango, jam, litchi, plum etc. are single fruits. When a single fruit is produced from a complete inflorescence, it is called a compound fruit. Composite fruits like jackfruit, pineapple etc.