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On evolutive systems and the initial evolution of structure and function

G C Theodoridis1, A Anne, L Stark

  • 1University of Virginia, Charlottesville 22908, USA.

Journal of Theoretical Biology
|January 7, 1996
PubMed
Summary

Evolutive systems, capable of development under environmental conditions, evolve through structure accumulation in transient assemblies. Survival selection, a general mechanism, drives evolution by favoring advantageous functions, potentially defining life itself.

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Area of Science:

  • Origin of Life Studies
  • Theoretical Biology
  • Systems Chemistry

Background:

  • Early life evolution requires systems capable of development and change.
  • Existing models often focus on generation-related selection for life's initiation.
  • A broader framework is needed to explore diverse evolutionary pathways.

Purpose of the Study:

  • Introduce and define 'evolutive systems' as a framework for studying early evolution.
  • Explore evolutionary mechanisms, particularly survival-related selection.
  • Investigate the emergence of functions and structures within these systems.

Main Methods:

  • Conceptual definition of evolutive systems based on building blocks and transient assemblies.
  • Utilized a computer-based evolutive automaton to simulate evolutionary scenarios.

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  • Analyzed selection mechanisms, emphasizing survival-related selection over generation-related selection.

    • Main Results:

    • Evolutive systems accumulate structure through cycles of disintegration and reassembly, driven by functional advantages.
    • Survival selection, applicable beyond reproduction, is a more general evolutionary driver.
    • Simulations demonstrate the emergence of functions like genetic code operation under spatial and temporal inhomogeneities.

    Conclusions:

    • Evolutive systems provide a robust model for understanding the fundamental processes of early evolution.
    • Key features of terrestrial life, like mortality and imperfect reproduction, are consistent with evolutive system prerequisites.
    • The overlap between evolutive system features and life suggests a continuum rather than a strict dichotomy.