#2.5i
Understand how a pollen grain forms in the anther and the embryo sac forms in the ovule.
#2.5ii
Understand how the male nuclei formed by division of the generative nucleus in the pollen grain reach the embryo sac, including the roles of the tube nucleus, pollen tube and enzymes.
#2.5iii
Understand the process of double fertilisation inside the embryo sac to form a triploid endosperm and a zygote.