Question

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. Which structure or structures produce substances most likely to affect the development of these traits?

testes
ovaries
prostate gland
vulva

Answer 1

testes

Step-by-step explanation:

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics and their developments are affected by testes

Answer 2

testes

Step-by-step explanation:

The increased secretion of testosterone from the testes during puberty causes the male secondary sexual characteristics to be manifested. In males, testosterone directly increases size and mass of muscles, vocal cords, and bones, deepening the voice, and changing the shape of the face and skeleton.