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 isfzczr-iepmzn):4)m/3b4l c trhwq 3 / an area of active)toen c0 zpw: g+(vlp;+va)uz research and exploration. Which statement is not evidence that viruses have origi p+e:uwt+;gcl ( vazvo)0)zpnns in 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 mutation rate is not evidence om.ihi l 4vln:.f viral origins, but rather a characteristic of some viruses. Similarities between genome sequences in viral and cell:4iml li.nv h.ular genes (Choice A), the coevolution of viruses and hosts (Choice B), and retroviral enzymes converting RNA to DNA (Choice C), are all evidence of viral origins from other organisms.
| 
