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Related Concept Videos

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...
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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...
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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...
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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.
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Speciation Rates01:07

Speciation Rates

Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.

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Related Experiment Video

Updated: Jun 5, 2026

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face
08:15

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Published on: January 7, 2019

Understanding proboscidean evolution: a formidable task.

J Shoshani1

  • 1Currently teaching at the Dept of Biology, University of Asmara, PO Box 1220, Asmara, Eritrea.

Trends in Ecology & Evolution
|January 18, 2011
PubMed
Summary
This summary is machine-generated.

Proboscidean evolution is viewed through three radiations, emphasizing general trends and character integration for success. Most ancient species are extinct, highlighting the need for further research into their biology.

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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

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Related Experiment Videos

Last Updated: Jun 5, 2026

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face
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Published on: January 7, 2019

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Area of Science:

  • Paleontology
  • Evolutionary Biology
  • Zoology

Background:

  • Proboscideans (elephants and their extinct relatives) exhibit a rich evolutionary history.
  • Understanding their diversification and adaptations is key to comprehending mammalian evolution.
  • Previous studies have focused on specific lineages, leaving broader trends less explored.

Purpose of the Study:

  • To present a new framework for proboscidean evolution based on three major radiations.
  • To highlight general evolutionary trends and origins within the proboscidean clade.
  • To interpret the role of character integration in proboscidean diversification and success.

Main Methods:

  • Analysis of fossil data spanning over 55 million years of proboscidean history.
  • Comparative analysis of primitive and derived traits across different proboscidean taxa.
  • Reconstruction of evolutionary trends and patterns.

Main Results:

  • A new model depicting proboscidean evolution through three major adaptive radiations.
  • Identification of the integration of primitive and derived characters as crucial for proboscidean success.
  • Documentation of the cosmopolitan distribution and diverse habitats of extinct proboscideans, with only 2-3 species surviving today.

Conclusions:

  • The proposed radiation model offers a new perspective on proboscidean evolutionary history.
  • Character integration played a vital role in the adaptive success and diversification of proboscideans.
  • Future research should focus on inferring infrasonic communication, brain evolution, and reproductive strategies of extinct proboscideans from extant species.