About one in ______ U.S. adolescents experience a STI each year.

A. three
B. six
C. nine
D. 12

Answer: B

Psychology

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In monozygotic twins, the average concordance rate for schizophrenia is about __

A. 50% B. 10% C. 5% D. 25%

Psychology

Which of the following statements istrue regarding sex-typed behaviors?

a. Boys' sex-typed behaviors are easily changed by modeling. b. Boys demonstrate sex-typed behaviors very early and these are resistant to change by modeling. c. Girls are particularly averse to cross-gender behaviors. d. Girls' sex-typed behaviors are resistant to change by modeling.

Psychology