differentiate between impotency and sterility.
Impotency is the inefficiency of a male individual to perform sexual activity. Sterility is the absence or lack of enough viable sperms to fertilize a female.
Differentiate between :
(a) semen and sperm
(b) implantation and pregnancy
(c) follicle and corpus luteum
(d) ammion and allantois
(e) impotency and sterility
(f) prostate gland and Cowper's gland (the nature of secretion)
(g) identical twins and fraternal twins
Impotence is