Question

what marks the onset of puberty in girls? ch:31
a slight deepening of the voice
an increase in breast size
a growth spurt
the first menstrual period
question 19
2 pts
what signals the onset of puberty in boys? ch:31
menarche
learning how to study
ejaculation
developing a satisfactory sex life

Explanation:

In girls, breast - bud development often marks puberty onset. In boys, testicular enlargement usually signals it, and ejaculation can follow later.

Answer:

First question: B. An increase in breast size
Second question: C. Ejaculation