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?
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.
Modern experiments show that wild emmer wheat can easily be domesticated so as to yield nearly as well as traditionally domestic strains.
At the time when emmer wheat was first cultivated, it was the most nutritious of all the varieties of grain that were then cultivated.
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.
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.
前提:remains of cultivated emmer weat found are from the same narrow strip
结论:emmer wheat was first domesticated somwhere in that strip
即:前提: 人工种植的小麦在那个狭长地带
结论:小麦第一次被驯化在那个狭长的地带
人工种植---------->第一次被驯化
中间有GAP
有野生小麦-------->被驯化--------->人工种植
所以被驯化如果成立,必须保证当时同时有野生的小麦和人工种植的小麦。
如果环境改变,则改变后的环境适宜人工种植的小麦的生存,改变之前则不适合,那么野生小麦存在的时候的气候不适合发现的人工种植的小麦,则说明不是同一个品种,或者人工种植的小麦是从其它地方传播过来的,而非驯化而来的,进行了削弱
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