Which of Earth's major extinctions was the most extensive, eliminating 70 percent of all terrestrial organisms and up to 95 percent of marine organisms?
A) Cambrian Explosion
B) Permian Extinction
C) Cretaceous Extinction
D) Late Devonian Extinction
Answer: B
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Countries that have a high proportion of economic self-sufficiency or independence from the world system, and do not contribute significantly to the world economy in terms of imports and exports, are
A) autarkies. B) anarchies. C) oligarchies. D) hegemonies. E) neo-Fordists.
Rogue waves are best described as ____
A) the highest waves of a tsunami B) a breaking internal wave C) a strong rocking motion within a harbor D) a single massive wave that develops in the open ocean
Which district in the North American Manufacturing Belt has a convergence of railroad and highway transportation routes that make it readily accessible to the rest of the country?
A) the central New York and Mohawk River valley B) Western Great Lakes, running from Detroit to Chicago C) Pittsburgh-Cleveland-Erie D) Middle Atlantic, including metropolitan New York E) southern New England, especially Boston
Approximately when did the rapid increase in human-produced atmospheric CO2 begin?
a. ?1900 b. ?1930 c. ?1950 d. ?1980 e. ?2000