Certain metallic crystals leave a record of the polarity of the earth at the point in time when they were formed in molten rock because they:
A. leave radioactive "signatures" that scientists can read
B. act as small magnets that orient themselves to the poles before the rock solidifies
C. form ring-type patterns like tree rings that can be counted
D. contain amino acids, which form as crystals, and this change in the amino acids can be used to determine the passage of time
B. act as small magnets that orient themselves to the poles before the rock solidifies
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To what primate suborder do tarsiers belong?
A. Haplorrhini B. Prehensile C. Orthograde D. Strepsirrhini E. Prosimian
Answer the following statements true (T) or false (F)
1) Only monopolies and dominant firms have market power. 2) When managers of monopolistically competitive firms solve for the profit maximizing quantity, they are determining the market quantity. 3) If a monopolistically competitive firm is producing 4,000 units of output and at this output level, the price is $18 and the average total cost is $8, it is not possible for the firm to be in long-run equilibrium. 4) If a monopolistically competitive firm is producing 2,000 units of output and at this output level, the price is $10 and the average total cost is $10, it is not possible for the firm to be in long-run equilibrium. 5) If a monopolistically competitive firm is producing 6,000 units of output and at this output level, the price is $15 and the average total cost is $15, it is possible for the firm to be in long-run equilibrium.
In 2009, a newly reported Ardipithecus find (a fairly complete skeleton of A. ramidus), dubbed Ardi (4.4 m.y.a.),
A. stood about a foot shorter and weighed half as much as Lucy. B. replaced Lucy (3.2 m.y.a.) as the earliest known hominin skeleton. C. is the ancestor of Homo but not australopithecines. D. is the new undisputed oldest hominin fossil. E. lived in a dry savanna habitat.
What is the term for the kind of cultural change that results when two or more cultures have consistent firsthand contact?
A. colonization B. imperialism C. enculturation D. acculturation E. independent invention