What development was necessary before foragers could live in tropical forest environments?
A) trade with agriculturalists to obtain carbohydrates
B) animal husbandry of small animals for protein
C) market economy to trade with neighbors for metal tools
D) an irrigation system to deal with heavy tropical rains
Answer: A
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One study compared the health of children born of familial incest with children of the same mother born of non-incestuous unions and found that __________.
A) both groups of children had high rates of genetic abnormalities B) the incestuous group had much higher rates of genetic abnormalities than the non-incestuous group C) the non-incestuous group had much higher rates of genetic abnormalities than the incestuous group D) neither group of children had high rates of genetic abnormalities
By 30,000 years ago, all of the following traits were evident in the human species except:
a. higher foreheads
b. smoother brow ridges
c. more distinct chins
d. more prominent cheekbones
Traditional agricultural systems are surprisingly much more efficient in terms of energy than modern mechanized agriculture
a. True b. False
A degree of ethnocentrism is found among all peoples and cultures
a. True b. False