Which of the following most logically completes the argument?
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb's high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.
Which of the following most logically completes the argument?
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb's high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.
Ahistidine is found in all parts of the plant-roots, stem, leaves, and flowers 分析A选项
Bthe herb's high level of histidine production is found to be associated with an unusually low level of production of other amino acids 分析B选项
Cothers of the closely related group of plants are also found to produce histidine in large quantities 分析C选项
Dcultivation of the herb in soil with high concentrations of the metals will, over an extended period, make the soil suitable for plants to which the metals are toxic 分析D选项
Ethe concentration of histidine in the growing herb declines as the plant approaches maturity 分析E选项
如果这题要加强的是“相关性”,则C可以是正确答案。
但是题干说的是“the herb's high histidine production is what allows it to grow in metal-rich soils”,这说的是“因果关系”,则扩大sample base不可以加强。反例就是上面的例子。
这题的确是C
OG16收录了这题。
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb's high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.
破题点在标黑那个地方,如果others of closely related group of plants和那个a certain cultivated有同样属性也有同样的结果的话,那么可以从线性因果上加强。
这题答案选E
果因推理找加强
前提(果):grow in metal-rich soils
结论(因):high histidine production
果--->因
非因:NOT high histidine production 对应 the conentration of the histidine declines
非果:NOT grow 对应 the plant approaches maturity (成熟就不长了)
E就是非因非果的加强。
C选项完全起不到加强作用:即使the whole group of the plants都产生histidine也无法支持histidine是让他们得以在metal-rich soil生长的原因,the hypothesis依然还是那个hypothesis。扩大了sample base对于因果关系没有任何作用。