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经典真题300篇 -8938【medium】 00:00:00 关闭计时
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Some studies have shown that red-backed salamanders (RBS) are scarce in areas with acidic soils and that those present in such conditions have smaller-than-average bodies. Explanations have included the possibility that young RBS are adversely affected by acidic soil, that adult RBS can sense and may avoid acidic soil conditions, or that loss of RBS prey 

populations due to acidic soil could result in reduced RBS populations. Yet researchers found fairly high densities of large- bodied RBS at Lake Claire Watershed, where soil conditions are acidic. One hypothesis is that intraspecific geographical variation in acidity tolerance (i.e., local adaptation to an acidic environment) could exist for RBS. Previous studies showed potential local adaptation of some salamander species to acidity. 

Which of the following can be inferred about the studies mentioned in the highlighted portion of  the passage?

正确答案: E 耗时:
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  • 当前版本由371524c更新于2020-04-22 15:46:38 感谢由371524c对此题目的解答所做出的贡献。

    答案:E。推断题。

    第一句讨论的是酸性土壤的rbs的生长情况,E正确,对应“Lake Claire Watershed, where soil conditions are acidic...”。

    A错,faulty methodology无中生有。

    B错,无中生有。

    C错,found evidence that acidic conditions adversely affect the prey 无中生有。

    D错,unsubstantiated conclusions逻辑错误。作者并未下定论。

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