If a trait has high heritability, ____
a. hereditary differences will not account for any observed variations in that trait
b. the environment cannot influence that trait
c. the environment may possibly influence that trait
d. heredity does not influence that trait
c
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Intravenous drug users represent __________ of AIDS cases
a. less than 1% b. about 5% c. over 25% d. about 75%
A vaginal photometer and a penile plethysmograph can be used as measures of
a. orgasm. b. sexual arousal. c. sexual satisfaction. d. blood flow to the vagina or penis.
The greatest gains in identity formation occur
a. in high school. b. in college. c. once a career is decided upon. d. once a person moves out of his or her parent's home.
GABA is the most common excitatory neurotransmitter in the brain
a. true b. false