Biology – Quantitative Biology – Populations and Evolution
Scientific paper
2009-10-14
International Journal of Astrobiology, 7: 293-300 (2008)
Biology
Quantitative Biology
Populations and Evolution
17 pages, 1 figure
Scientific paper
10.1017/S1473550408004308
Many mechanisms, functions and structures of life have been unraveled. However, the fundamental driving force that propelled chemical evolution and led to life has remained obscure. The 2nd law of thermodynamics, written as an equation of motion, reveals that elemental abiotic matter evolves from the equilibrium via chemical reactions that couple to external energy toward complex biotic non-equilibrium systems. Each time a new mechanism of energy transduction emerges, e.g., by random variation in syntheses, evolution prompts by punctuation and settles to a stasis when the accessed free energy has been consumed. The evolutionary course toward an increasingly larger energy transduction system accumulates a diversity of energy transduction mechanisms, i.e., species. The rate of entropy increase is identified as the fitness criterion among the diverse mechanisms which places the theory of evolution by natural selection on the fundamental thermodynamic principle with no demarcation line between inanimate and animate.
Annila Arto
Annila Erkki
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