Zebra mussels ________
A) are presently restricted to the Great Lakes and Hudson River, but they are expected to spread rapidly in the near future
B) are native to Canada
C) excrete waste that facilitates algae blooms and subsequent eutrophication of lakes
D) were introduced into the United States in the early 1900s
E) are an invasive exotic species that clogs water intake pipes at factories, power plants, and wastewater treatment facilities
Answer: E
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A sustainable yield is
A. the average rate at which a renewable resource can be used without reducing its available supply. B. the lowest rate at which a nonrenewable resource can be used without reducing its available supply. C. the highest rate at which a nonrenewable resource can be used without reducing its available supply. D. the highest rate at which a renewable resource can be used without reducing its available supply. E. the lowest rate at which a renewable resource can be used without reducing its available supply.
The coastal Atlantic forests of Brazil, Argentina, Uruguay, and Paraguay are of great value because of their
A) mineral resources. B) biodiversity. C) large land area — 80% of the forest remains undeveloped. D) advanced and successful restoration programs, which have restored 70% of the region.
With what bioregion is the term "steppe" associated?
A) grasslands B) tropical forests C) deciduous forests D) coniferous forests E) tundra
In what spaces or voids does most groundwater reside?
A) Caves B) Pore spaces C) Fractures D) Pore space and fractures