The atlatl
a. is a type of projectile point.
b. is used for starting fires.
c. is used to increase the distance of a spear throw.
d. is a drill.
e. is used for fishing.
C
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Environmental factors have little effect on human intelligence.
a. true b. false
________ plays a role in determining skin color.
A. Sickle-cell anemia B. The HbSÂ allele C. Ultraviolet radiation D. Lactose tolerance E. Lactose intolerance
The study of disease in prehistoric populations is called paleoanthropology
Indicate whether the statement is true or false.
Which of these statements about negative reciprocity is true?
a. It is like market exchange without using money. b. It is motivated by the desire to obtain material goods at minimal cost. c. It can take the form of barter. d. All of these are true of negative reciprocity.