Genetic resistance to antibiotics has
a. increased the spread of AIDS
b. been a factor in the development of MRSA
c. been favored by overuse of antibiotics
d. two of these answers are correct
e. all of these answers
D
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Which of the following types of damage from tropical cyclones originates farthest from the coast?
A) Flooding by rain swollen inland streams B) Storm surges that raise sea level C) High winds eroding local beaches D) Burial of neighborhoods by sand
In zonal flow patterns
A) Rossby waves are absent. B) cold air flows toward the equator. C) warm air flows toward the poles. D) midlatitude westerlies run nearly due west to east. E) large amplitude waves are prominent.
Which climate control can lead to both cooling and warming?
A. less atmospheric aerosols B. more carbon dioxide C. more clouds D. less equatorward currents E. more ice surfaces
A clay-rich soil may hold a great deal of water; however, such a soil may not necessarily be desirable in an agricultural setting because clay soils
A. are often too acidic for most crops. B. are nutrient-poor. C. are often slow to drain due to their low permeability. D. release toxic heavy metals, which are incorporated into plant tissues.