As you know, 16S rRNA is used to in phylogenetic classification owing to slow rates evolution of this gene, being in all prokaryotes etc. But which mechanism maintains this situation? Or is there any accepted notion regarding that ?
Yes Mr. Cheng you are right. I agree with you. But I think you just a little bit misunderstood my question. I ask which mechanism leads to this protection of 16sRrna, vital structure of Ribosome and thereby of life ?