The Angiosperm Plant Body
•Structure and development
–Formation of embryo
–Mature embryo and seed
–Embryo to adult
In most angiosperms, the ovule consists of three layers of tissue:
1.Integuments - two outer layers of diploid (2N) tissue that will develop into the seed
2.Nucellus - the wall of megasporangium, also diploid (2N).
3.Embryo sac - also call the megagametophyte of angiosperms, consists of only 7 cells.
Contains 8 haploid nuclei in all.