When looking at the concept of "race," it is important to remember that
a. human groups have intermixed for so many centuries that it is impossible to tell, biologically, to what "race"
any given individual belongs.
b. the best available evidence suggests that all people descended from the same ancient ancestors in Africa.
c. among early human populations, darker skin was a protective adaptation to sun exposure near the equator.
d. all of these statements are true.
ANSWER: d
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Which of the following is sometimes a serious problem with repeated measures designs?
a. Carryover effects can cloud the interpretation. b. Small sample sizes can distort the results more than with other designs. c. They require more subjects than designs with independent samples. d. all of the above
The specialty of the physician who performs an autopsy is
a. oncologist. b. radiologist. c. pathologist. d. psychiatrist. e. none of the above.