2. 外语
  3. The passage is primarily concerned with______ According to the passage, researchers working under the two-category hypothesis w

The passage is primarily concerned with______ According to the passage, researchers working under the two-category hypothesis w

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问题 The passage is primarily concerned with______
According to the passage, researchers working under the two-category hypothesis were correct in thinking that______
选项 A、prokaryotes form a coherent group
B、the common ancestor of all living things had complex properties
C、eukaryotes are fundamentally different from true bacteria
D、true bacteria are just as complex as eukaryotes
E、ancestral versions of eukaryotic genes functioned differently from their modern counterparts.
答案C
解析 The best answer is C. Lines 26-28 indicate that C is an aspect of the two-category hypothesis that “has been sustained by more recent research.” Thus, the passage supports the assumption, made by proponents of the two-category hypothesis, that “eukaryotes are fundamentally different from true bacteria” (choice C). The passage contradicts the idea that prokaryotes “from a coherent group” (choice A) because it states that there is “one respect” (line 27-28) in which new evidence contradicts the hypothesis: in addition to the eukaryotes and the “true bacteria,” which are prokaryotes, there exists another distinct “evolutionary branch” within the prokaryotes: the archebateria (38-41). The two-category hypothesis, as presented in the passage, proposes neither B nor E and asserts the opposite of D.
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