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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 ______.

【选项】others of the closely related group of plants are also found to produce histidine in large quantities

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:GWD-217
难度: 难