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 of active researg+ch2sy 5v kms(9nwu2 ch rv)1 o y3tix76bs5a uux5 yd1kand exploration. Which statement is not evidence that viruses have origins in other y156sad1r3tx7ubo vx)y 5ku iorganisms?
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 correctv tre3*+h *zio because the rapid mutation 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 hostih3z*ov e r+*ts (Choice B), and retroviral enzymes converting RNA to DNA (Choice C), are all evidence of viral origins from other organisms.
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