本题目来源于试卷: Unity and Diversity A.5 Viruses，类别为 IB生物学
[单选题]
The origin of viruses is an area o 3eori+8u8c2,oys fkuqonp32f active research and exploration. Whj/y8fov.r l tnt51p1 hich statement is not evidence that viruses have origins invnl.hfr81 51j yto/t p other organisms?
A. Similarities between genome sequence in viral and cellular genes.
B. Coevolution of viruses and host.
C. Retroviral enzymes such as reverse transcriptase convert RNA to DNA.
D. Rate of mutation is rapid in viruses.
参考答案: D
本题详细解析:
Choice D is correct because the rapid mu fmwj p yl.)sx14b1zh2tation rate is not evidence of viral origins, but rather a characteristic of some viruses. Similarities between genome sequences in viral and cellular genes (Choice A), the coevolution of viruses and hosts (Choice B), and retroviral enzymes cl4 h m11)s2xpjby zf.wonverting RNA to DNA (Choice C), are all evidence of viral origins from other organisms.
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