文章概况:文章第一段开头说地球的重力对血液循环造成一定的影响,而结尾举了一个蛇的例子,说这种蛇有一种能力使得血液循环不受重力影响!
文章第二段拿sea snakes和第一段的 Terrestrial snakes进行类比,来说明 Terrestrial snakes确实有能力使血液循环不受重力影响!
文章第三段解释了一下 Terrestrial snakes这种蛇具有这种特殊能力的原因,这个原因和这种动物心脏的位置有关系.后面举了一些例子,涉及到了sea snake和arboreal snakes.
Question #25. 147-01 (22404-!-item-!-188;#058000147-01)
The passage provides information in support of which of the following assertions?
(A) The disadvantages of an adaptation to a particular feature of an environment often outweigh the advantages of such an adaptation.
(B) An organism\'s reaction to being placed in an environment to which it is not well adapted can sometimes illustrate the problems that have been solved by the adaptations of organisms indigenous to that environment.
(C) The effectiveness of an organism\'s adaptation to a particular feature of its environment can only be evaluated by examining the effectiveness with which organisms of other species have adapted to a similar feature of a different environment.
(D) Organisms of the same species that inhabit strikingly different environments will often adapt in remarkably similar ways to the few features of those environments that are common.
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