According to research, teachers' attitudes may be one factor which contributes to the difficulties experienced by adolescents entering middle or junior high school

Samuel still felt enraged hours after he was cut off on the highway, and he wanted to hit somebody. This may be because his _____ glands are still signaling his brain, maintaining this response to the earlier threat

a) thymus b) sex c) pineal d) adrenal

Down syndrome can often be traced to ________

a. a defect in the shape of the uterus b. a defect in the mother's egg cell c. exposure to lead d. maternal depression