The skeletal remains of people living during the last ice age (fifteen thousand to thirty thousand years ago) indicate that these individuals were smaller on average than modern humans and less healthy

Which of the following pubescent developmental changes in girls help to prepare their bodies for childbirth?

a. The development of pubic hair and the start of menstruation. b. The increase in physical height and the enlargement of the uterus. c. The widening of hips and the growth of breasts. d. The development of facial hair and the lowering of the voice.

Alcohol

a. enhances sexual performance by stimulating the central nervous system b. impairs sexual performance by depressing the central nervous system c. has effects on sexual behavior similar to cocaine and amphetamine d. can be considered to be an aphrodisiac