Sasha has blue eyes and Hans has gray eyes. Their son, Antonio, received the genetic information for eye color from both of his parents, even though you cannot determine Antonio's actual genetic makeup from the color of his eyes

Research findings reported by Werner and her colleagues in Hawaii indicate that

premature infants who made the greatest progress tended to grow up in families with a. lots of physical stimulation. b. substantial food supplements. c. sufficient education. d. indigenous values and beliefs.

There is clear evidence that females show more aggression than men

a. in those cultures that encourage aggressive behaviors in both genders. b. in those cultures that exhibit lower testosterone levels in women than in men. c. in those cultures that exhibit lower testosterone levels in men than in women. d. in certain situations, for example, protecting offspring from predators.