"For Darwin, natural selection is a drawn-out, complex process involving multiple interconnected causes. Natural selection requires variation in a population of organisms. For the process to work, at least some of that variation must be heritable and passed on to organisms’ descendants in some way. That variation is acted upon by the struggle for existence, … Continue reading Natural Selection
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Explanation of Why Life on Earth is Made Out of Only 20 Amino Acids When Hundreds are Possible| PNAS
"One of the long-standing questions in origins-of-life research centers on how the proteinaceous side chains and the protein backbone were selected during the earliest phases of evolution. Here we have studied oligomerization reactions of a group of positively charged amino acids, both proteinaceous and nonproteinaceous. Amino acids spontaneously oligomerized without the use of enzymes or … Continue reading Explanation of Why Life on Earth is Made Out of Only 20 Amino Acids When Hundreds are Possible| PNAS
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