Which part of the sperm helps in penetrating the egg membrane?

What is the role played by luteinizing hormones in males and females respectively?

Which pair of enzymes is found in the acrosome of mammalian sperm?

Which type of division is observed during the second maturation phase of gametogenesis?

For normal fertility,what percentage of sperm must have normal shape and size (in $\%$)?

In the testis,the immature germ cells produce sperm by $...A...$ at puberty. $...B...$ present on the inside wall of seminiferous tubules multiply by $...C...$ division and increase their number. Identify $A$,$B$,and $C$ from the above statement.