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Related Concept Videos

Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
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Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Human evolution: new playgrounds for natural selection.

Emmanuel Milot1, Fanie Pelletier

  • 1Groupe de recherche PRIMUS, Département de médecine de famille, Université de Sherbrooke, CHUS-Fleurimont, Sherbrooke, Québec, Canada. emmanuel.milot@usherbrooke.ca

Current Biology : CB
|May 25, 2013
PubMed
Summary
This summary is machine-generated.

Natural selection is still active in modern humans, contrary to popular belief. Modernization is significantly altering evolutionary pressures and human biological traits.

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Area of Science:

  • Evolutionary biology
  • Human evolution
  • Population genetics

Background:

  • Common misconception that natural selection is no longer relevant for humans.
  • Modernization introduces novel environmental and social factors influencing human populations.

Purpose of the Study:

  • To investigate the continued operation of natural selection in contemporary human societies.
  • To examine how modernization impacts evolutionary selection pressures on humans.

Main Methods:

  • Analysis of recent demographic and genetic data from diverse modern populations.
  • Comparative studies assessing changes in selection pressures over time.
  • Identification of specific traits influenced by modernization.

Main Results:

  • Empirical evidence confirms ongoing natural selection in modern human populations.
  • Modernization is demonstrably reshaping selection pressures.
  • Significant alterations in human biological nature are being observed due to these pressures.

Conclusions:

  • Natural selection remains a dynamic force in shaping human evolution.
  • Understanding these modern selection pressures is crucial for comprehending human biological trajectories.
  • Future research should focus on the long-term implications of modernization on human adaptation.