Natural catastrophes ____
a. occur only to animals, not plants and humans
b. are an environmental control on the organization and structure of ecosystems
c. affect only soils
d. are an environmental control on soil distribution
b
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There are currently a number of megacities on the planet, with populations greater than 10 million. The most populous hypercity on the planet, with a population of 35 million people, is
a. Mumbai in India b. Tokyo in Japan c. New York City in the United States d. Moscow in Russia e. Montreal in Canada
Seawater that exceeds the 35‰ average is termed
A) brackish. B) brine. C) mesohaline. D) freshwater.
By the principle of ________, the surface feature known as the Grand Canyon is ________ than the sedimentary formations that are exposed in the side walls of the Grand Canyon.
A. inclusion; older B. superposition; younger C. cross-cutting relationships; older D. superposition; older E. cross-cutting relationships; younger
Polar stratospheric clouds are thought to contribute to the problem of ____
a. global warming b. ozone destruction c. acid rain d. photochemical smog e. radio wave interference