Air pollution
A) is only a problem in South Asian cities.
B) is only a problem in urban areas.
C) is generated from power plants, factories, and motor vehicles.
D) is only associated with hydrocarbons.
E) is less pervasive than acid rain.
Answer: C
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A change in the genetic composition of a population is called
a. Emigration b. Mutation c. natural selection d. Evolution e. genetic drift
What two things does the hydrologic cycle do?
A. Distributes and warms water B. Distributes and increases the salinity of water C. Distributes and purifies water D. Distributes and contaminates water
Endemic species are
A) well-established and show the least risk of extinction. B) limited to just one location, such as an island. C) widely distributed, found especially on large continents. D) usually the dominant species within an ecosystem.
The water balance for Kingsport, Tennessee exhibits
A) a net water surplus (SURPL) during each month of the year. B) water deficits each month of the year. C) net demands for water for 10 months of the year. D) water deficits in the summer months.