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该题平均耗时:3m6s,平均正确率:41.2% 添加做题笔记

There is no consensus among researchers regarding what qualifies a substance as a pheromone. While most agree on a basic definition of pheromones as chemicals released by one individual of a species which, when detected by another individual of the same species, elicit a specific behavioral or physiological response, some researchers also specify that the response to pheromones must be unconscious. In addition, the distinction between pheromones and odorants— chemicals that are consciously detected as odors---can be blurry, and some researchers classify pheromones as a type of odorant. Evidence that pheromone responses may not involve conscious odor perception comes from the finding that in many species, pheromones are processed by the vomeronasal (or accessory olfactory) system, which uses a special structure in the nose, the vomeronasal organ (VNO), to receive chemical signals. The neural connections between the VNO and the brain are separate from those of the main olfactory system, whose processing of odorants triggers sensations of smell. But while the VNO does process many animal pheromone signals, not all animal pheromones work through the VNO. Conversely, not all chemical signals transmitted via the VNO quality as pheromones. For example, garter snakes detect a chemical signal from earthworms—one of their favorite foods—via the VNO, and they use this signal to track their prey.

It can be inferred from the passage that in classifying pheromones as a type of odorant, the researchers referred to in highlight posit that


  • 分析A选项
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  • 分析B选项
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  • 分析C选项
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  • 分析D选项
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  • 分析E选项
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该题目由网友ntYSK6提供。更多GMAT题目请

网友解析

当前版本由 kisenana 更新于2015-11-03 12:09:38感谢由 kisenana 对此题目的解答所做出的贡献。
定位到黑体的some researchers这里
In addition, the distinction between pheromones and odorants— chemicals that are consciously detected as odors---can be blurry, and some researchers classify pheromones as a type of odorant. 这些研究者把P列为O的一种,而O是有意识的
选项A 正确
选项B VNO回文层次未提及
选项C VNO回文层次未提及
选项D does not occur exclusively between members of the same species.文章未提及
选项E do not always elicit a specific behavioral or physiological response层次未提及


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    1123

    因为p是无意识的而o是有意识的 这些研究人员把p划归于o就说明他们认为p是有意识的
    4楼  | 2018-09-14 11:42:24 回复
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    陆anny

    此外,信息素和气味剂——有意识地被察觉为气味的化学物质的区别——可能是模糊的,一些研究者把信息素分类为一种气味剂。
    3楼  | 2018-07-15 15:48:49 回复
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    xiaoyi

    In addition, the distinction between pheromones and odorants— chemicals that are consciously detected as odors---can be blurry, and some researchers classify pheromones as a type of odorant.
    the relationship following the passage should be explained propriately!!
    2楼  | 2017-08-15 13:32:32 回复
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    xiaoyi

    the attitude of researchers!!
    1楼  | 2017-04-16 16:05:32 回复
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