According to recent research, American girls reported having their breasts touched by a boy by about 16 years of age. In contrast American boys reported touching a girl's breasts earlier. On average, how much earlier did boys begin this sexual act?

Which of the following statements is true?

a) It is impossible for dendritic branching to occur prenatally. b) Synaptogenesis and dendritic branching occur both prenatally and postnatally. c) Synaptogenesis only occurs prenatally and dendritic branching only occurs postnatally. d) Dendritic branching only occurs prenatally and synaptogenesis only occurs postnatally.

Scientists have just discovered a new hormone that appears to have very specific effects. This specificity of effects is most likely due to ____.?

a. ?a small distance between the gland and the target organs b. ?unique receptors on the target organ c. ?the hormone being secreted by the target organs d. ?the hormone being active in the bloodstream