Children the world over tend to progress to two-word sentences at _________
a. 18-24 months
b. 6-12 months
c. 12-18 months
d. 18-36 months
a
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Nabta Playa was an important center for prehistoric herders in southern Egypt
Indicate whether the statement is true or false.
Small-scale producers of crops or livestock living on rented lands in exchange for labor and exploited by a more dominant class are called:
a. slaves b. serfs c. peons d. peasants
Which of the following is NOT a factor in the emergence and spread of dangerous infectious diseases like HIV/AIDS, Ebola, West Nile, SARS, Lyme disease, and Zika?
A. spillovers from humans to wildlife B. modern air travel C. population increase D. changing settlement patterns E. commercial expansion
All of the following help integrate tribal societies EXCEPT:
A) age-based groups. B) belief in common descent from an ancestor. C) military societies. D) secret societies. E) formal court systems.