Biologist E. O. Wilson proposed a list of priorities for protecting aquatic biodiversity. What is one of those priorities?
A. Decrease government subsidies for commercial fishing.
B. Identify and preserve the world's aquatic biodiversity hot spots.
C. Prevent the melting of arctic ice.
D. Prevent ocean and freshwater acidification.
E. Relocate people living in or near aquatic ecosystems.
Answer: B
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A) Magma from a partially melting tectonic plate makes its way through the crust. B) Subducting lithosphere descends into the mantle. C) Two tectonic plates diverge and create a rift valley. D) Sediments from a turbidity current settle out in a deep ocean basin.
Which of the following statements is true concerning radioactive wastes?
A. Spent fuel rods have had their radioactivity depleted. B. Low level wastes are stored at nuclear power plants since they are not as dangerous as nuclear wastes. C. Military wastes have a lifetime of approximately 100 years. D. Consumer wastes tend to accumulate at the fastest rate.
Which of the following is not one of the standard soil horizons?
A) A horizon B) O horizon C) C horizon D) B horizon E) D horizon
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A. A B. B C. C D. All of the above are neutral solutions. E. none of the above