1. GWD-26-Q7-Q9 pheromones是什么东东，是不是该划为odorantThere is no consensus among researchers regarding what qualifies a substance as a pheromone.
While most Line agree on a basic definition of pheromones (5) 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 (10) 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 (15) 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 (20) 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 (25) 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 phero- (30) mones 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 (35) the VNO, and they use this signal to track their prey. 这篇文章的主题比较隐藏，要仔细看。 ----------------------------------------- Q7 It can be inferred from the passage that in classifying pheromones as a type of odorant, the researchers referred to in
line 15 posit that A. pheromones are perceived
consciously B. most pheromones are processed
by the VNO C. most chemical signals processed
by the VNO are pheromones D. Pheromone perception does not
occur exclusively between members of the same species. E. pheromones do not always elicit
a specific behavioral or physiological response infer的题目一定要注意上下文。 -------------------------------------------------------------------- Q8 According to the passage, the fact that
pheromones are processed by the VNO
in many animal species has been taken
as evidence of which of the following? A. The accessory and main olfactory systems are not separate B. Odorants and pheromones are
not distinct types of chemicals. C. Odorants and pheromones both
elicit a specific behavioral
response. D. Pheromones do not trigger conscious sensations of smell. E. Pheromones aid animals in tracking prey. Evidence that pheromone responses may not involve conscious odor perception comes from the finding that in many species ------------------------------------------------------------------------------------------------------- Q9 The primary purpose of the passage is to A. compare and contrast the ways
in which the vomeronasal organ
and the main olfactory systern
process chemicals. B. summarize the debate over the
role the vomeronasal organ plays in odor perception C. present some of the issues
involved in the debate over
what constitutes a pheromone D. propose a new definition of
pheromones based on recent
research E. argue that pheromones should be
classified as a type of odorant 这道题目很容易误选了C，但是C后面的what constitutes a pheromone的constitute这个动词用得很不好，这方面的内容是文章从来没有提过的。 这篇文章的答案是ADE？ 22套给的答案是CDC
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发表于 2007-8-24 14:04:00
