The flow of energy through a biotic community is ________
A) cyclic and multidirectional
B) cyclic and unidirectional
C) noncyclic and multidirectional
D) noncyclic and unidirectional
D
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The safe movement of hazardous materials by rail or highway in the United States is regulated by
A) individual states and cities. B) the Department of Transportation. C) the regulations of the RCRA. D) the Justice Department.
One result of the increasingly efficient global hunt for fish is that larger individuals of commercially valuable wild species are ____.
A. becoming scarce B. becoming more prevalent C. becoming smaller in size D. feeding on new food sources E. migrating to new ocean areas
Thunderstorms are most common during ____
a. during the early morning in the spring b. on a cold, clear winter day c. during the winter on cold nights d. spring and summer afternoons e. cloudy fall afternoons
The four schematic cross sections below show the potential groundwater resources for an area of hills and valleys. Assume the region is underlain by an open aquifer composed of sand and gravel and receives plentiful rainfall. Which diagram is the best representation of the relationship between topography and water table?
A. Diagram A B. Diagram B C. Diagram C D. Diagram D