In girls, the onset of puberty brings the lowering of the voice at approximately age: A. 15. B. 14. C. 11. D. 13.

In girls, the onset of puberty brings the lowering of the voice at approximately age:

A. 15.
B. 14.
C. 11.
D. 13.

 
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During puberty, boys: A. decrease body fat by about 20 percent. B. more than double their arm strength. C. increase muscle strength most noticeably in the legs. D. increase muscle strength by about 20 percent.

During puberty, boys:

A. decrease body fat by about 20 percent.
B. more than double their arm strength.
C. increase muscle strength most noticeably in the legs.
D. increase muscle strength by about 20 percent.

 
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Which of the following behaviors seems to reduce the risk of an adolescent developing an eating disorder? A. vitamin supplementation B. exercise C. genetic testing D. the family sharing meals together

Which of the following behaviors seems to reduce the risk of an adolescent developing an eating disorder?

A. vitamin supplementation
B. exercise
C. genetic testing
D. the family sharing meals together

 
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Barry is taking a weight-lifting class in high school. The weights he lifts should: A. force him to maximum exertion. B. match his projected size for next year. C. be tailored to his size of the previous year. D. reflect that his muscles were the first part of his body to develop.

Barry is taking a weight-lifting class in high school. The weights he lifts should:

A. force him to maximum exertion.
B. match his projected size for next year.
C. be tailored to his size of the previous year.
D. reflect that his muscles were the first part of his body to develop.

 
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