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Related Concept Videos

The Evidence for Evolution02:55

The Evidence for Evolution

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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.
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Convergent Evolution01:54

Convergent Evolution

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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.
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Eukaryotic Evolution01:24

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The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
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Synteny and Evolution02:31

Synteny and Evolution

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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.
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Gene Evolution - Fast or Slow?02:05

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Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

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The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
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Related Experiment Video

Updated: Jan 26, 2026

Adjunctive Diode Laser Therapy and Probiotic Lactobacillus Therapy in the Treatment of Periodontitis and Peri-Implant Disease
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Forty-five-year evolution of probiotic therapy.

Scarlett Puebla-Barragan1,2, Gregor Reid1,2

  • 1Departments of Microbiology & Immunology, and Surgery, Western University.

Microbial Cell (Graz, Austria)
|April 9, 2019
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Summary

Probiotics have evolved into a vital health field, offering alternatives to drugs with significant benefits. Future research will expand their applications in various health areas and ecosystems.

Keywords:
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Area of Science:

  • Microbiology
  • Human Health
  • Translational Research

Background:

  • The field of probiotics has significantly advanced over the past 45 years.
  • Growth is driven by the need for alternatives to drugs with adverse effects and a rising interest in natural products.
  • Scientific evidence on probiotic genetics, metabolism, and clinical effectiveness underpins this growth.

Purpose of the Study:

  • To review the evolution and current state of probiotic research and application.
  • To highlight the scientific principles guiding probiotic development.
  • To project future applications of probiotics in health and ecosystems.

Main Methods:

  • Review of scientific literature and clinical studies on probiotics.
  • Analysis of genetic and metabolic properties of probiotic strains.
  • Examination of clinical trial data for probiotic efficacy.

Main Results:

  • Probiotics have transitioned from laboratory concepts to a recognized field with demonstrated human benefits.
  • While some products lack evidence, many companies are now basing formulations on scientific data.
  • Evidence supports the effectiveness of specific probiotic strains for various health outcomes.

Conclusions:

  • Adherence to probiotic definitions and evidence-based conclusions is crucial.
  • Future advancements will be driven by microbiome research and the identification of novel beneficial strains.
  • Probiotics are poised for expanded applications in cardiovascular, digestive, brain, skin, and other health domains, as well as in ecosystems.