How does a sperm differ from an ovum?

How many chromosomes are present in an unfertilized egg?

Identify the layers of the ovum from inside to outside.

Where is the $Corpus$ $luteum$ found?

Match the part of the sperm in Column $I$ with its component in Column $II$ and its function in Column $III$, and select the correct option.

Column $I$ (Part of sperm)	Column $II$ (Component) and Column $III$ (Function)
$A$. Head	$Q$. Acrosome - $Z$. Secretes penetrating enzyme
$B$. Neck	$P$. Centrioles - $X$. Helps in formation of synkaryon spindle
$C$. Middle piece	$R$. Nebenkern - $Y$. Provides energy for sperm movement
$D$. Tail	$S$. Axial filament - $W$. Whiplash movement in female reproductive tract

The sperm produces substances of enzymatic nature called sperm lysin. In mammals,it is called