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Evolution of Staircase Structures in Diffusive Convection
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A degenerative process underlying hierarchic transitions in evolution.

Terrence W Deacon1

  • 1University of California, Berkeley, USA.

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|September 8, 2022
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Summary
This summary is machine-generated.

This study details a new evolutionary pathway, contingent neutral evolution (CNE), where functional redundancy enables gradual specialization and irreversible codependency, facilitating hierarchical transitions in biological systems.

Keywords:
Contingent neutral evolutionCooperationInverse darwinismRelaxed selectionmajor Transitions

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Area of Science:

  • Evolutionary biology
  • Systems biology
  • Genetics

Background:

  • Hierarchical transitions in biological evolution are complex and not fully explained by traditional Darwinian mechanisms.
  • Contingent Neutral Evolution (CNE) offers a framework for understanding these transitions.

Purpose of the Study:

  • To describe a novel evolutionary process driving hierarchical transitions.
  • To elucidate the role of functional redundancy and codependency in evolution.

Main Methods:

  • The study proposes a theoretical framework based on evolutionary principles.
  • It analyzes the impact of functional redundancy, relaxed selection, and synergistic interactions.

Main Results:

  • Functional redundancy, arising from duplication or symbiosis, allows for neutral degeneration of functions.
  • Synergistic interactions between degenerated functions can lead to irreversible codependency.
  • This process facilitates the formation of higher-order evolutionary units.

Conclusions:

  • The described evolutionary process provides a mechanism for hierarchical transitions, complementing Darwinian selection.
  • It explains how the loss of autonomy can lead to the formation of integrated, higher-order systems.