According to Vygotsky, children's cognitive development progresses more rapidly when they walk hand in hand with an expert partner

Teenage pregnancies are a far greater problem today than several decades ago because

A) most public schools teach abstinence only, which does little to prepare teens for safe sex. B) the stigma of teenage parenthood is much worse and many couples refuse to adopt the baby of a teenage mother. C) adolescents are far less likely to marry before childbirth, increasing the negative consequences for both mother and baby. D) most adolescents lack the knowledge and resources to protect themselves from unwanted pregnancies.

Which of the following is an autosomal dominant disorder?

A) Huntington's disease B) Phenylketonuria C) Sickle-cell disease D) Tay-Sachs disease