ChaseDream

标题: PREP1 旧 21 有点不明白 [打印本页]

作者: weirui5621 时间: 2010-11-3 21:07
标题: PREP1 旧 21 有点不明白

21.(28551-!-item-!-188;#058&003690)

Traces of cultivated emmer wheat have been found among the earliest agricultural remains of many archaeological sites in Europe and Asia.The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia

.Since the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip, it is clear that emmer wheat was first domesticated somewhere in that strip.

Which of the following, if true, most strengthens the argument?

(A) The present-day distribution of another wild wheat, einkorn, which was also domesticated early in the development of agriculture, covers a much larger area of southwest Asia.

(B) Modern experiments show that wild emmer wheat can easily be domesticated so as to yield nearly as well as traditionally domestic strains.

(C) At the time when emmer wheat was first cultivated, it was the most nutritious of all the varieties of grain that were then cultivated.

(D) In the region containing the strip where wild emmer wheat has been found, climatic conditions have changed very little since before the development of agriculture.

(E) It is very difficult, without genetic testing, to differentiate the wild form of emmer wheat from a closely related wild wheat that also grows in southwest Asia.

问下D选项说气候没改变过，算是加强吗？怎么个加强法，排除它因？

作者: zhlee 时间: 2010-11-3 21:51
证明这个麦子最早在这个地方驯化，要有两个条件，一个是要有最早的遗迹，另一个是使要证明这个遗迹里的麦子是在当地驯化的。

题干中说这个遗迹里的这种麦子是已经发现的最老的，同时当地有野生的品种。 D 的条件可以推断出，在那个时期，当地也很可能有这种麦子的野生品种。

作者: eshopaholic 时间: 2010-11-5 08:06
需要加强的是wild type在domestication之前就在那个区域。

对D取非，就可能是由于气候的改变，在domestication之后wild type才能在那里生存，否定了结论。

确实挺绕的

欢迎光临 ChaseDream (https://forum.chasedream.com/)