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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.
Gene Duplication and Divergence02:37

Gene Duplication and Divergence

The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
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...
Synteny and Evolution02:31

Synteny and Evolution

John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
The Fossil Record02:56

The Fossil Record

The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
What is Natural Selection?01:32

What is Natural Selection?

Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.The Theory of Natural...

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Related Experiment Video

Updated: Jun 26, 2026

Resurrection of Dormant Daphnia magna: Protocol and Applications
07:37

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

Darwin's Originality.

Peter J Bowler1

  • 1School of Philosophy and Anthropological Studies, Queen's University of Belfast, University Road Belfast, Belfast, Northern Ireland, BT7 1NN, UK. p.bowler@qub.ac.uk

Science (New York, N.Y.)
|January 10, 2009
PubMed
Summary
This summary is machine-generated.

Charles Darwin

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Area of Science:

  • Evolutionary Biology
  • Natural Selection
  • Scientific Theory Development

Background:

  • Darwin's theory of natural selection, proposed in 1859, was initially met with significant resistance.
  • Despite acceptance of evolution, contemporaries rejected Darwin's specific mechanism of natural selection.
  • This article examines the foundational elements that led Darwin to formulate his revolutionary theory.

Discussion:

  • Darwin's extensive studies in biogeography provided crucial insights into species distribution.
  • His observations of animal breeding (artificial selection) informed his understanding of heritable traits.
  • Darwin recognized the critical role of the 'struggle for existence' in driving evolutionary change.

Key Insights:

  • Biogeographical data and artificial selection were pivotal in Darwin's formulation of natural selection.
  • The concept of the struggle for existence provided the selective pressure necessary for evolution.
  • Darwin's synthesis integrated diverse observations into a cohesive evolutionary framework.

Outlook:

  • Understanding the historical development of natural selection theory enhances current evolutionary biology research.
  • Darwin's foundational work continues to influence modern scientific thought.
  • Further exploration of historical scientific controversies can illuminate the process of scientific innovation.