Recent research on hunters-gatherers indicates all of the following EXCEPT:
a. some hunter-gatherers have never had direct contact with technologically-advanced populations.
b. some hunter-gatherers are chronically undernourished.
c. there are occasional seasonal fluctuations in the hunter-gatherer diet.
d. many hunter-gatherers spend significantly less amounts of time in subsistence than we originally thought.
e. some hunter-gatherers have been involved in raiding and fighting with other groups.
a
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Human infants that are lighter or heavier in weight have a lower chance of survival than those of average weight. This is an example of:
A. directional selection B. disruptive selection C. stabilizing selection D. averaging selection
A person learns to apply rules for differentiating phonemes unconsciously __________
a. in the womb b. during infancy c. during childhood d. in adulthood
A mutation of the ________ may account for why humans have the capability for speech but chimpanzees do not.
A. lungs B. hyoid C. microcephalin gene D. tongue E. FOXP2 gene