When during the sleep cycles do nightmares most occur?
a. Stage 1
b. Stage 3
c. REM stage
d. Stage 4
c
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What determines whether a mammal develops male or female external genitals?
a. the amount of testosterone during prenatal development b. the amount of estrogens during prenatal development c. the difference (subtraction) between testosterone and estrogen levels in prenatal development d. the ratio (division) between testosterone and estrogen levels in prenatal development
One of the genes for eye color from the mother matches exactly with a gene from the father at the moment of conception. This pair of genes is said to be
heterozygous. pair-matched. homozygous. monozygotic.
What infant response did Gibson and Walk (1960) measure in their visual cliff research?
A. Heart rate B. Visual acuity C. Muscle tone D. Visual fixation
In a field study by Shultz and his colleagues (2007), several households in a neighborhood received weekly feedback about their level of energy consumption relative to their neighbors. How are these results being applied?
a. Neighbors tell each other tips for better energy conservation. b. Energy companies send out workers to assess energy consumption. c. Some utility companies now put a smiley or sad face on customers' bills. d. People are "paying it forward" and teaching others about energy conservation.