Where does fertilization occur in mammals?

Identify $A$ and $B$ and their respective functions:

Following are some events occurring during the fertilization process. Arrange the $CORRECT$ sequence of events and choose the option given below.
$i$. Fertilizin-antifertilizin reaction.
$ii$. Cortical reaction.
$iii$. Acrosome reaction.
$iv$. Karyogamy.
$v$. Capacitation of sperms.

Who demonstrated the acrosome reaction in Saccoglossus?

Meroblastic cleavage refers to which type of division of egg?

The process of fusion of a sperm (male gamete) and an ovum (female gamete) is called?