What causes rickets?
a. overexposure to ultraviolet radiation
b. too much vitamin D
c. an insufficient amount of melanin
d. too few melanocytes
e. an insufficient amount of vitamin D
e
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Trial-and-error learning, in which an organism adjusts its behavior on the basis of direct experience, is also referred to as __________
A. conditioning B. higher education C. instinct D. situational learning
In human foraging societies:
A. there is a sexual division of labor, where men hunt and women collect vegetable food B. food sharing is important C. the vegetable foods consumed are often difficult to find, acquire, and process D. all of these
What is communitas?
A. a social inequality that is accepted even by those who are less privileged B. a collective liminality C. anxiety D. the Latin word for mana E. the supernatural
Scholars believe that food production first began in the Middle East in the
A. alluvial desert. B. hilly flanks. C. desert oases. D. high plateau. E. marginal areas.