The various post-fertilization events occurring in angiosperms are :
(i) Primary endosperm nucleus gives rise to endosperm. It is formed before the development of the embryo, as it provides nourishment to the developing embryo.
(ii) The zygote at the micropylar end undergoes successive divisions to form mature embryo.
(iii) Ovule is converted into seed.
(iv) Ovary develops into fruit.
