In the past,U.S.mothers typically engaged in ________.Today,U.S.mothers typically engage in ________.

A) a greater amount of child care than fathers;a lesser amount of child care than fathers
B) nearly twice as much child care as fathers;nearly twice as much child care as fathers
C) nearly twice as much child care as fathers;the same amount of child care as fathers
D) the same amount of child care as fathers;the same amount of child care as fathers

What behavioral genetic research finding seems to support the conclusion that the effect of growing up in the same home environment is rather minimal?

A) The personality traits of monozygotic (MZ) twins are correlated at .50 on average.
B) The personality traits of dizygotic (DZ) twins are correlated at .30 on average.
C) The personality traits of adoptive siblings raised in the same family are correlated
Around .05.
D) The personality traits of adoptive siblings raised in the same family are correlated
Above .25.

The people that would be considered high risk in an assessment of bone loss during middle age are those whose activities include any of the following EXCEPT

A) smoking.
B) lifting weights.
C) alcohol use.
D) poor dietary habits.