Fertilization is essential for the production of seed, but in some angiosperms seeds develop without fertilization.
(a)Give an example of an angiosperm that produces seeds without fertilization. Name the progress.
(b)Explain the two way by which seeds develop without fertilization.

Explanation

(i) Citrus is a good example of angiosperm in which embryo are produced from cells of nucellus without fertilization . The process is called nucellar adventive embryony - a kind of apomixis.