The cyclic expansion and contraction of blood vessels of the limbs in order to prevent frostbite while maintaining heat in the body core is called a(n):
a. secular trend.
b. developmental adaptation.
c. physiological adaptation.
d. hunting response.
e. gathering response.
d
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Complementary opposition is typical of which kind of group?
A) age-sets B) segmentary lineages C) clans D) secret societies
As a natural monopoly ________ production, its ________ constantly falls throughout the range of demand.
A) increases; long-run average cost B) increases; sunk cost C) decreases; marginal cost D) decreases; long-run average
While brain size remained unchanged for 3-4 million years in hominid ancestors, what about those ancestors was changing, according to the evidence?
What will be an ideal response?
Why are anthropologists concerned with preserving indigenous peoples?
What will be an ideal response?