Which part of the sperm contains hydrolytic enzymes?

The mother germ cells are transformed into a mature follicle through a series of steps. Provide the missing steps in the blank boxes.
$\boxed{\text{Oogonia}} \to \boxed{A} \to \boxed{\text{Primary follicle}} \to \boxed{B} \to \boxed{C} \to \boxed{\text{Mature or Graafian follicle}}$

After ovulation,the mammalian ovum is surrounded by which of the following layers?

In which phase of gametogenesis does meiosis occur?

The presence of an antrum is observed in the ........ follicle.

Which of the following cells during gametogenesis is normally diploid?