What is apomixis? How is it different from polyembryony?

Apomixis is a type of asexual reproduction which does not involve fertilization. It does not lead to seed formation.

Polyembryony is the process in which the fertilization of single egg leads to the formation of two or more embryos.

The difference between apomixis and polyembryony is that the apomixis does not involve fertilization while polyembryony is the result of fertilization.