A low-oxygen level in the Gulf of Mexico ________.
A. kills most bottom organisms, is responsible for a decline in Gulf fisheries, and has been linked to excess nutrients supplied by the Mississippi River
B. has been linked to excess nutrients supplied by the Mississippi River
C. is responsible for a decline in Gulf fisheries
D. kills most bottom organisms
E. kills most bottom organisms and has been linked to excess nutrients supplied by the Mississippi River
Answer: E
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A freely falling boulder has a speed of 30 m/s at one instant. Exactly 2 seconds later, its speed will be
A. more than 50 m/s. B. 50 m/s. C. the same. D. 40 m/s.
Which of the following is responsible for about half of all air pollution in the United States?
A) Coal-fired power plants B) Railroad trains C) Cars, trucks, and buses D) Paper mills and steel mills
The boundaries of the Köppen climates are largely based on the limits of certain ________ associations
Fill in the blank(s) with correct word
The part of the subsurface where most of the pore spaces are filled with air is the
A. aquifer. B. unsaturated zone. C. saturated zone.