Topic: Evolution
Quote: The point should be made that explicit selection for EM seems to necessitate both the occurrence of codon reassignments and group selection to generate and select alternate codes. The proposal that explicit selection for the EM did not occur, and that EM arose neutrally from the addition of similar amino acids to similar codons, may be termed the \xe2\x80\x98Nonadaptive Code\xe2\x80\x99 Hypothesis, in contrast to the Adaptive Code Hypothesis. Finally, on a fundamental level, as a result of the analyses presented here, the presence of EM in the SGC may be used as evidence that enzymes, whether partially proteinaceous, RNA based, or based on some other macromolecule, were already extant during the evolution of the SGC.
Response: The article cautions on blithely using natural selection as an explanation for the features of the genetic code.\nArticle 9:\nIn this article, the functional integrity and how the architecture of the code relates to it is discussed.\nFrom the article:\n
2.4