The Origin(s) of Cell(s): Pre-Darwinian Evolution from FUCAs to LUCA : To Carl Woese (1928-2012), for his Conceptual Breakthrough of Cellular Evolution
| Autor: | Shiping Tang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0303 health sciences Evolution of cells Biological evolution Biology 010603 evolutionary biology 01 natural sciences Genealogy 03 medical and health sciences Genetics Darwinism Molecular Biology Ecology Evolution Behavior and Systematics Mechanism (sociology) 030304 developmental biology Ancestor |
| Zdroj: | Journal of molecular evolution. 89(7) |
| ISSN: | 1432-1432 |
| Popis: | The coming of the Last Universal Cellular Ancestor (LUCA) was the singular watershed event in the making of the biotic world. If the coming of LUCA marked the crossing of the “Darwinian Threshold”, then pre-LUCA evolution must have been Pre-Darwinian and at least partly non-Darwinian. But how did Pre-Darwinian evolution before LUCA actually operate? I broaden our understanding of the central mechanism of biological evolution (i.e., variation-selection-inheritance) and then extend this broadened understanding to its natural starting point: the origin(s) of the First Universal Cellular Ancestors (FUCAs) before LUCA. My hypothesis centers upon vesicles’ making-and-remaking as variation and competition as selection. More specifically, I argue that vesicles’ acquisition and merger, via breaking-and-repacking, proto-endocytosis, proto-endosymbiosis, and other similar processes had been a central force of both variation and selection in the pre-Darwinian epoch. These new perspectives shed important new light upon the origin of FUCAs and their subsequent evolution into LUCA. |
| Databáze: | OpenAIRE |
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