Wooden spears would have improved the efficiency of hunting. The oldest date to
A) about 900,000 years ago and are found in China
B) about 400,000 years ago and are found in Africa
C) about 400,000 years ago and are found in England and Germany
D) about 700,000 years ago and are found in Indonesia
E) about 1.6 million years ago and are found in Africa
C
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Which of the following is related to the evolution of skin pigmentation in human populations?
A. the amount of ultraviolet radiation and the need for vitamin D B. the amount of carbohydrates versus proteins that are in the diet C. the need for natural camouflage from predators D. iron and zinc compounds in the soil
If the marginal benefit curve is linear and downward sloping and the marginal cost curve is linear and upward sloping, a decrease in the marginal cost that causes a downward shift of the curve will ________ the profit-maximizing number of units undertaken.
A) increase B) reduce by exactly half C) decrease D) not change
Social evolutionary theory was derived completely from Charles Darwin’s theory of biological evolution
a. True b. False
Violent conflicts in band societies are rarely over which of the following?
a. Property b. Jealousies c. Marriage rights d. Sexual relations