After returning from summer vacation,Phil notices that his teenage neighbor,Alexander,has begun to shave and his voice has become slightly deeper.Phil concludes that these changes are most likely due to:
A) puberty
B) Turner's syndrome
C) increased secretion of progesterone
D) increased secretion of estrogen

Question

Quizplus · Accepted Answer

The changes that Phil observes in Alexander are typical signs of puberty in males, including the growth of facial hair and a deeper voice. Therefore, puberty is the most likely explanation for these changes. Choices B, C, and D are not relevant to male puberty.

After Returning from Summer Vacation,Phil Notices That His Teenage Neighbor,Alexander,has