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Related Concept Videos

Eukaryotic Evolution01:24

Eukaryotic Evolution

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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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Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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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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The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

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The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
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Three-Domain System of Life01:21

Three-Domain System of Life

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Ribosomal RNA (rRNA) sequence analysis revealed three distinct groups of cells: eukaryotes, bacteria, and archaea. In 1978, Carl R. Woese proposed the concept of domains, a taxonomic level above kingdoms, to differentiate these groups. He suggested that archaea and bacteria, despite their similar appearance, represent separate domains. Domains differ in rRNA, membrane lipid structure, transfer RNA, and antibiotic sensitivity.In this classification, animals, plants, and fungi belong to the...
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RNA-seq03:21

RNA-seq

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
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Next-generation Sequencing03:00

Next-generation Sequencing

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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
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Related Experiment Video

Updated: Oct 6, 2025

Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples
11:23

Purifying the Impure: Sequencing Metagenomes and Metatranscriptomes from Complex Animal-associated Samples

Published on: December 22, 2014

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Why sequence all eukaryotes?

Mark Blaxter1, John M Archibald2, Anna K Childers3

  • 1Wellcome Sanger Institute, Hinxton, Cambridge CB10 1SA, United Kingdom; mb35@sanger.ac.uk.

Proceedings of the National Academy of Sciences of the United States of America
|January 19, 2022
PubMed
Summary
This summary is machine-generated.

Sequencing all eukaryotic genomes is crucial for understanding life's evolution and biodiversity. The Earth BioGenome Project aims to create a comprehensive digital library of life, revealing insights into speciation and adaptation.

Keywords:
conservationdiversityecologyevolutiongenome

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Last Updated: Oct 6, 2025

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Area of Science:

  • Evolutionary Biology
  • Genomics
  • Biodiversity Science

Background:

  • Life on Earth exhibits increasing complexity, with eukaryotes showing significant morphological innovation.
  • Genomes encode the history and functional blueprint of life, driving evolutionary processes.
  • Current genomic data is insufficient to address key evolutionary and ecological questions.

Purpose of the Study:

  • To advocate for the high-quality sequencing of all extant eukaryotic species.
  • To highlight the necessity of comprehensive genomic data for understanding biodiversity.
  • To propose the Earth BioGenome Project as a foundational resource for life sciences.

Main Methods:

  • Discussing the rationale for sequencing all eukaryotic species, not just a select few.
  • Emphasizing the need for genomic data across all major evolutionary divergences.
  • Leveraging existing proposals for a comprehensive eukaryotic genome sequencing initiative.

Main Results:

  • Whole-genome data from all eukaryotic species is essential for addressing evolutionary and ecological questions.
  • A "genomic tree of life" will illuminate speciation, adaptation, and ecosystem dependencies.
  • Comprehensive genomic data will resolve challenges in phylogenetics, evolution, ecology, conservation, agriculture, and medicine.

Conclusions:

  • Sequencing all eukaryotic genomes is a critical endeavor for scientific advancement.
  • The Earth BioGenome Project offers a pathway to a deeper understanding of life on Earth.
  • This initiative promises broad applications across diverse scientific and industrial fields.