If a boy notices a swelling around his nipples during puberty, what is the likely cause?
A. the normal fluctuation of sex hormones B. cancer
C. abnormally high levels of estrogen
D. drug abuse
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Secondary sex characteristics are characteristics that:
A. occur later in development.
B. are hard to detect.
C. are inside the body.
D. are not directly related to reproduction
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Changes in primary sex characteristics during puberty include:
A. growth of pubic hair and underarm hair. B. rapid increase in height.
C. growth of the uterus and the testes.
D. growth of a beard
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Adolescent acne is usually brought on by:
A. changes in diet.
B. changes in the lymphoid system.
C. sexual frustration.
D. increased activity of oil and sweat glands
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