Differentiate between spermatogenesis and oogenesis in humans on the basis of the following:
(a) When the process is initiated.
Spermatogenesis: Begins at puberty.
Oogenesis: Begins during fetal development.
(a) Who discovered Penicillin and how? Explain.
(b) Why is this discovery considered accidental?
(c) In what way did it prove to be a "milestone" in the field of medicine?