Because of their high rate of mutation. They also can be hard to track because they infuse their DNA into your body cell DNA and can lay dormant and undetected for years.
"<span>Semi-permeable nature of the membrane" is the property of the membrane among the choices given in the question that this can be attributed to. The correct option among all the options that are given in the question is the fourth option or option "D". I hope that the answer has actually come to your help.</span>
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