The effects of Werner's syndrome support the theory that __________ causes aging
A. DNA damage
B. free radicals
C. senescence
D. menopause
Answer a
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All of the following EXCEPT __________ pose serious threats to Amazonian Indians, both by pushing them off their land and by killing them
a. multinational corporations b. the Brazilian government c. settlers d. cattle ranchers
The language(s) most efficient at expressing abstract ideas
a. is Navajo. b. is Chinese. c. is German. d. is English. e. does not exist; no single language is most efficient.
Which of these crops, introduced by the Portuguese, significantly increased the productivity of farming in Africa?
a. Corn and manioc b. Peanuts and papaya c. Sweet potatoes and pineapples d. Cotton
Investigation of Neandertal skeletons reveals abundant evidence __________
a. that they were not at all different from H. sapiens b. of bodies adapted to warm sunny climes c. of a relatively easy and painless lifestyle d. of traumatic injuries associated with rough terrain