A) It propels the sperm through the female reproductive tract.
B) It protects the sperm from vaginal secretions.
C) It contains enzymes that dissolve the protective layers around the egg.
D) It contains a haploid nucleus.
E) It holds large numbers of mitochondria.

A) decreased levels of estrogen or testosterone.
B) decreased levels of GnRH.
C) increased levels of progesterone.
D) decreased LH levels.
E) increased levels of estrogen or testosterone.

A) seminal vesicles.
B) bulbourethral glands.
C) the prostate gland.
D) Sertoli cells.
E) interstitial cells.