The ability of humans to live in a variety of environments outside their African origins was made possible by __________
a. the end of the Ice Age
b. the capacity for culture
c. the extinction of large predators outside Africa
d. a land bridge from Asia to North America
Answer: b
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Big City Java is a local coffee bar. Using Excel, the manager of Big City Java estimates the weekly demand function for their grand mocha coffees to be Qd = 650 - (15.25 × P). The estimated regression equation suggests which of the following is true?
A) The price of grand mocha coffees represents the dependent variable in the regression equation. B) If a price of $5 is charged, the predicted weekly demand of grand mocha coffees is 453.75. C) There is a positive relationship between the price of grand mocha coffees and the quantity demanded. D) As the price of grand mocha coffees increases, the quantity demanded decreases.
For natural selection to work on a particular population
A. their members must have a sufficiently long life span. B. the environment must remain constant. C. there must be a strong will to survive among the members of the population. D. there must be variety within that population. E. there must be genotypic diversity but phenotypic homogeneity.
The Romance languages (e.g., French, Spanish) belong to which of the following language families?
A. Mixe-Zoque B. Indo-European C. North Caucasian D. Dravidian E. Austro-Asiatic
Monopolistically competitive firms have some market power because ________.
A) there are perfect substitutes for each firm's product B) there are many sellers in the market C) there are no barriers to entry D) each firm produces a differentiated product