List the post-fertilization events in angiosperms.

The major post-fertilization events in a flower include

i) Development of endosperm

ii) Development of embryo

iii) Development of seed

iv) Maturation of Ovary into a fruit

1. Development of an Endosperm:

The development of an endosperm takes place before the development of an embryo. The primary endosperm cell divides repeatedly to form a triploid endosperm tissue (3n). The primary endosperm nucleus undergoes successive nuclear divisions in a lot of cases giving rise to a free nuclear endosperm.

2. Development of an Embryo:

Embryo is seen to develop at the micropylar end of the embryo sac where the zygote is present. The endosperm provides the nutrition needed for development of the embryo.

3. Development of a Seed:

Double fertilisation is unique in angiosperms (flowering plants) and triggers the maturation of ovule into a seed. The seeds are formed inside fruits.

4. Maturation of Ovary into a Fruit:

Due to cell division and differentiation in the ovary, a fruit is formed.