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) were introduced into the United States in the early 1900s
C) are native to Canada
D) are an invasive exotic species that clogs water intake pipes at factories, power plants, and wastewater treatment facilities
E) excrete waste that facilitates algae blooms and subsequent eutrophication of lakes
D
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Why do large, broad beaches have gradual slopes?
a. They have coarse particles. b. They are not in equilibrium. c. Larger particle tend to build up at the back of the beach. d. They have a large area for wave energy to dissipate. e. Onrushing water disappears into the beach minimizing transport back to the ocean.
This area of the desert southwest is characterized by mostly flat-lying beds of sedimentary rock over 1,500 meters above sea level.
A. Basin and Range B. Great Salt Lake C. Butte province D. Colorado Plateau E. Interior Desert
What do you notice concerning the percentage of permanent gasses throughout the atmosphere (all levels)? [INSERT TABLE 1-2. WITH CAPTION]
A) It varies significantly from the surface up. B) It varies significantly only at the tropopause. C) It is the same throughout the atmosphere from the surface up. D) It varies only in the mesosphere.
After gravity, what is the major cause of mass wasting?
A)slope gradient B)weakening by weathering C)overloading D)vegetation loss E)increased water content