Final answer:
The Wolffian duct can potentially form into male reproductive structures such as the epididymis, ductus deferens, and seminal vesicles. In the absence of testosterone, this duct will degenerate.
Step-by-step explanation:
The Wolffian duct is a structure present in the embryo that has the potential to develop into internal male reproductive structures. In male fetal development, the presence of testosterone stimulates the Wolffian duct to differentiate into male reproductive organs such as the epididymis, ductus deferens, and seminal vesicles. If testosterone is not present, the Wolffian duct will degenerate, and in females, it does not develop into reproductive structures, as the Müllerian duct instead gives rise to the uterine tubes and uterus.