How many sperm make it up the fallopian tubes to where fertilization can take place?
a) just one
b) a few hundred
c) a few thousands
d) a few million
Answer: d
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Work-family conflicts are arguably worse for couples in the United States because Americans work _____ with fewer _____ than any other developed country.
A. less hours; promotions B. more hours; vacation days C. more hours; years of education D. less hours; workers per supervisor
The protein produced by fat cells that is believed to be especially important in initiating puberty for females is
A) menarche. B) estrogen. C) HPG. D) leptin.
By the end of the third week of prenatal development, the neural tube begins to form. This structure will eventually become __________.
A. the skull and torso B. the legs and arms C. the spinal cord and brain D. the lungs and the digestive system
In the context of one-group pretest-posttest design, testing effects occur when
A. the basic characteristics of the measuring instrument change over time. B. a confounding event occurs at the same time as the experimental manipulation. C. a participant becomes bored or fatigued. D. taking a pretest changes a participant's behavior.