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Related Concept Videos

The Evidence for Evolution02:55

The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.The collection of fossils within sedimentary rocks give a record of common ancestry and often depicts the history of evolution.
Characteristics of Life01:23

Characteristics of Life

Biology is a natural science that studies life and living organisms, including their structure, function, development, interactions, evolution, distribution, and taxonomy. The field's scope is extensive and divided into several specialized disciplines, such as anatomy, physiology, ethology, genetics, and many more. All living things share a few key traits, including cellular organization, heritable genetic material and the ability to adapt/evolve, metabolism to regulate energy needs, the...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
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...
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...
Entropy within the Cell01:22

Entropy within the Cell

A living cell's primary tasks of obtaining, transforming, and using energy to do work may seem simple. However, the second law of thermodynamics explains why these tasks are harder than they appear. None of the energy transfers in the universe are completely efficient. In every energy transfer, some amount of energy is lost in a form that is unusable. In most cases, this form is heat energy. Thermodynamically, heat energy is defined as the energy transferred from one system to another that is...

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Fifty-year old and still ticking.... an interview with Emile Zuckerkandl on the 50th anniversary of the molecular clock. Interview by Giacomo Bernardi.

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Related Experiment Video

Updated: Jul 19, 2026

A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws
09:10

A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws

Published on: April 24, 2016

Intelligent design and biological complexity.

Emile Zuckerkandl1

  • 1Department of Biological Sciences, Stanford University and Institute of Molecular Medical Sciences, P.O. Box 20452, Stanford, California 94309, USA. emileIMMS@aol.c <emileIMMS@aol.c>

Gene
|October 3, 2006
PubMed
Summary

Evolutionary biological complexity arises spontaneously, not from supernatural intelligence. Nature

Area of Science:

  • Evolutionary biology
  • Biochemistry
  • Philosophy of science

Background:

  • Biological complexity is often cited as evidence for supernatural intelligence.
  • The concept of intelligent design posits a creator for complex biological systems.

Purpose of the Study:

  • To critically review the role of supernatural intelligence in biological complexity.
  • To explore alternative, naturalistic explanations for the origin of biological complexity.

Main Methods:

  • Critical analysis of existing theories on intelligent design.
  • Examination of molecular mechanisms driving evolutionary complexity.
  • Review of nature's spontaneous molecular processes.

Main Results:

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Last Updated: Jul 19, 2026

A Protocol for Bioinspired Design: A Ground Sampler Based on Sea Urchin Jaws
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Published on: April 24, 2016

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  • Evidence suggests intelligence and design are absent from evolutionary processes.
  • Biological complexity can increase spontaneously through molecular interactions and repair.
  • Specific molecular pathways for spontaneous complexity increase are identified.
  • Conclusions:

    • Supernatural intelligence is not required to explain biological complexity.
    • Evolutionary processes, driven by molecular mechanisms, adequately account for biological complexity.
    • The study proposes a naturalistic framework for understanding the emergence of complexity.