Which of the following is an example of a polyamide?
A) Lexan
B) nylon-66
C) polystyrene
D) poly(ethylene terephthalate)
B
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Which of the following is true regarding the amount of liquid freshwater at Earth's surface?
A) Lakes, rivers, and swamps contain 0.3 percent of the world's fresh water supply. B) Freshwater resources contain 11.02% of the world's fresh water supplies. C) Combined, freshwater sources contain the majority of the world's freshwater. D) The amount of the world's fresh water in rivers and streams is greater than that in the atmosphere. E) Of freshwater supplies in lakes, rivers, and swamps, rivers contain the greatest amount of freshwater.
Why aren't the geothermal resources of Yellowstone National Park used to generate power?
A. It could not be done profitably. B. We do not have the technology. C. It would reduce the aesthetic value of the scenery. D. All of the above.
Businesses are now willing to become "green" because
A. It improves their public image B. Doing so is expensive but makes good advertising C. It immediately saves them money D. Doing so improves their image and saves money in the end E. They need to obey laws and comply with government regulations
A vector is an organism that ________
A) is beneficial to parasitized organisms B) is always parasitic C) preys upon vulnerable species D) a host species vulnerable to infection E) carries a parasite but is never affected by it