What is the process of division of the zygote into blastomeres called?

What is the name of the enzymatic component produced by the sperm that dissolves the egg membrane?

$A$: Fertilizins are glycoproteins present on the surface of the egg membrane.
$R$: They help in the agglutination reaction by interacting with anti-fertilizins on the sperm surface to facilitate fertilization.

What happens during fertilization in humans after many sperms reach close to the ovum?

Capacitation occurs in

During fertilization,which centriole of the sperm gives rise to a spindle system inside the egg?