The male and female reproductive systems begin as an indifferent stage. If testosterone is present, which of the following occurs?
A. The mesonephric ducts atrophy.
B. The mesonephric ducts form the ductus deferens.
C. The paramesonephric ducts enlarge to form the scrotum.
D. The paramesonephric duct forms the vagina.
E. The paramesonephric duct atrophies.
Answer: B
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