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Related Concept Videos

Evolutionary Psychology01:20

Evolutionary Psychology

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...
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Convergent Evolution01:54

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.The structures that arise from convergent evolution are called analogous structures. They are similar in function even if they are dissimilar in structure. Further, structures can be analogous while also...
What is Evolutionary History?02:35

What is Evolutionary History?

Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.Phylogenetic trees illustrate the evolutionary relationships among these organisms. Scientists infer organisms’ common ancestry by evaluating shared morphological and genetic characteristics. Together, the fossil...
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.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
Criticisms of the Evolutionary Perspective01:23

Criticisms of the Evolutionary Perspective

In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
Evolutionary psychology provides one explanation for these findings, suggesting...

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Related Experiment Video

Updated: Jul 18, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

Exploring evolutionary constraints is a task for an integrative evolutionary biology.

P M Brakefield1, J C Roskam

  • 1Institute of Biology, Leiden University, P.O. Box 9516, 2300 RA Leiden, The Netherlands. p.m.brakefield@biology.leidenuniv.nl

The American Naturalist
|November 17, 2006
PubMed
Summary

Evolutionary constraints

Area of Science:

  • Evolutionary biology
  • Developmental biology
  • Genetics

Background:

  • Evolutionary constraints are crucial in evolutionary biology but their role in evolutionary change is debated.
  • Lack of robust analyses on constraints hinders understanding of evolutionary patterns.
  • Phenotypic variation generation influences evolutionary constraints and biases.

Purpose of the Study:

  • To explore how phenotypic variation generation leads to evolutionary constraints and biases.
  • To advocate for an integrative approach across biological organization levels.
  • To investigate butterfly wing eyespot evolution as a model system.

Main Methods:

  • Utilizing evolutionary genetics and evolutionary developmental biology (evo-devo).
  • Employing an emerging model species for research.

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

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10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

  • Initiating a comparative approach across extant taxa in two genera.

    • Main Results:

    • Research on butterfly wing eyespots illustrates an integrative approach.
    • Combination of evolutionary genetics and evo-devo applied to a model system.
    • Comparative analysis of variability patterns initiated.

    Conclusions:

    • An integrative approach is essential for understanding evolutionary constraints.
    • Butterfly wing eyespots provide a valuable model for studying evolutionary patterns.
    • Further comparative studies will elucidate variability and constraint mechanisms.