(TCOs 7 and 9) At what ages do the two major brain growth spurts occur?
11–12 and 13–15
12–14 and 17–18
13–15 and 17–18
13–15 and 18–20
(TCOs 7 and 9) Which of the following is a change in primary sex characteristics that takes place during puberty?
Growth of breasts
Changing voice pitch
Growth of pubic hair
Formation of a uterus
(TCOs 7 and 9) Which of the following is an example of changes in secondary sex characteristics during puberty?
Growth of the testes
Growth of the breasts
Growth of the penis
Growth of the ovaries
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