Can a Single Tree Bear Different Fruits?

It is common knowledge that a single tree only bears fruit of one kind. For instance, a pear tree can only bear pears; an apricot tree, apricots. Is it possible tree can bear fruit of several kinds? The

answer surpris-ingly is yes For instance, if a Chinese flowering crabap-ple is grafted with apple and emmenoptery shenryi, it will bear not only the fruit of the grafted free, but also the fruits of the other two trees. However, the grafting can not be done freely, only trees with similar nature can be grafted together.