Approximately ________ percent of Americans live in urbanized areas
A) 90
B) 70
C) 50
D) 40
E) 30
Answer: B
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Determining a discrete threshold level of exposure is most difficult for
A) all carcinogens. B) most acids. C) all salts. D) almost all bases.
Given three solutions, each of which contains 1.0 g of solute dissolved in 100 mL of water, which of the following solutes will cause the solution to have the highest osmolarity?
A) ribose, C5H10O5 B) glucose, C6H12O6 C) sucrose, C12H22O11 D) None, they all have the same osmolarity.
Which of these drives fires in Southern California?
A. Pacific trade winds B. Southeast trade winds C. Santa Ana winds D. Santa Clara winds
What would fossil ages from the geologic timescale tell us about the age of this unconformity?
A. The amount of time represented by the unconformity can be approximately bracketed by the ages of the fossils above and below. B. The unconformity is older than the fossil ages in layers above the unconformity. C. The unconformity is younger than the fossil ages on the tilted bed. D. All of these choices are correct.