Q20 sulfur dioxide a major contributor to acid rain

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Q20: Sulfur dioxide, a major contributor to acid rain, is an especially serious pollutant because it diminishes the respiratory system’s ability to deal with all other pollutants. A. an especially serious pollutant because it diminishes the respiratory system’s ability to deal B. an especially serious pollutant because of diminishing the respiratory system’s capability of dealing C. an especially serious pollutant because it diminishes the capability of the respiratory system in dealing D. a specially serious pollutant because it diminishes the capability of the respiratory system to deal 11
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E. a specially serious pollutant because of diminishing the respiratory system’s ability to deal Answer: ------------------------------------------------------------------------------------------------------------ Q21: Telomerase is an enzyme that is produced only in cells that are actively dividing. For this reason it is generally absent from body tissues in adults. Bone marrow is an exception to this rule, however, since even in adults, bone marrow cells continually divide to replace old blood cells. Cancers are another exception, because their cells are rapidly dividing. The information provided most strongly supports which of the following? ------------------------------------------------------------------------------------------------------------ Q22: Astronomer: Observations of the Shoemaker-Levi comet on its collision course with Jupiter showed that the comet broke into fragments before entering Jupiter’s atmosphere in 1994, but they did not show how big those fragments were. Nevertheless, some indication of their size can be inferred from spectrographic analyses of Jupiter’s outer atmosphere. After the fragments’ entry, these analyses revealed unprecedented traces of sulfur. The fragments themselves almost certainly contained no sulfur, but astronomers believe that the cloud layer below Jupiter’s outer atmosphere does contain sulfur. Since sulfur would have seeped into the outer atmosphere if comet fragments had penetrated this cloud layer, it is likely that some of the fragments were at least large enough to have passed through Jupiter’s outer atmosphere without being burned up. In the astronomer’s argument, the two portions in boldface play which of the following roles? 12
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