单选题Which of the following is discussed by the author of Passage 1 but not by the author of Passage 2 ?ASingle-celled bacteriumBMicroevolutionCEvolutionary mutationsDThe genetic recordEIntermediate steps

单选题
Which of the following is discussed by the author of Passage 1 but not by the author of Passage 2 ?
A

Single-celled bacterium

B

Microevolution

C

Evolutionary mutations

D

The genetic record

E

Intermediate steps


参考解析

解析:
第一篇文章的作者提到了基因记录,第二篇文章的作者没有提到遗传记录的存在,故选D项。

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