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Related Concept Videos

Phylogeny01:23

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire...
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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...
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
Genome Size and the Evolution of New Genes03:21

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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.
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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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Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Nested structure acquired through simple evolutionary process.

Kazuhiro Takemoto1, Masanori Arita

  • 1Department of Computational Biology, Graduate School of Frontier Sciences, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561, Japan. takemoto@cb.k.u-tokyo.ac.jp

Journal of Theoretical Biology
|March 24, 2010
PubMed
Summary
This summary is machine-generated.

Evolutionary processes can explain the non-random nested structure and heterogeneous connectivity observed in plant-animal mutualistic networks. This evolving network model simplifies network analysis and offers evolutionary insights into network formation.

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Network Science

Background:

  • Non-random nested structures govern cooperation and biodiversity in plant-animal mutualistic networks.
  • Existing models explaining these patterns are static and do not incorporate evolutionary dynamics.

Purpose of the Study:

  • To propose an evolving network model for plant-animal interactions.
  • To demonstrate that evolutionary processes can predict non-random network structures.

Main Methods:

  • Development of an evolving network model for plant-animal interactions.
  • Analysis of the model to predict structural patterns like nestedness and connectivity.

Main Results:

  • Simple evolutionary processes qualitatively and quantitatively predict nested structure.
  • Heterogeneous connectivity is also predicted by the evolutionary model.
  • The model offers an alternative explanation for non-random patterns in mutualistic networks.

Conclusions:

  • Evolutionary processes are a key driver in the formation of non-random structures in mutualistic networks.
  • Evolving network models can simplify the study of ecological networks.
  • This approach provides evolutionary insights into the emergence of biodiversity and cooperation patterns.