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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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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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In a multicellular organism, cells must communicate to work together in a coordinated manner. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
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Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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The protist cultural renaissance.

Javier Del Campo1, Maria Carlos-Oliveira2, Ivan Čepička3

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Reviving protist culturing is essential for understanding their biosphere roles. Integrating advanced omics, imaging, and single-cell tools will usher in a new era for protist research.

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Area of Science:

  • * Protistology, Microbial Ecology, Molecular Biology

Background:

  • * Protists are crucial, yet understudied, components of global ecosystems.
  • * Traditional culturing methods face limitations in capturing protist diversity and function.

Purpose of the Study:

  • * To advocate for the integration of modern technologies with protist culturing.
  • * To outline a strategic approach for advancing protist research.

Main Methods:

  • * Review and synthesis of current omics (genomics, transcriptomics, proteomics), advanced imaging, and single-cell technologies.
  • * Discussion of their application to protist cultivation and analysis.

Main Results:

  • * Highlighting the synergistic potential of combining culturing with high-throughput omics and imaging.
  • * Identifying key technological and strategic advancements needed.

Conclusions:

  • * A coordinated effort integrating culturing with cutting-edge techniques is necessary.
  • * This approach will facilitate a "golden age" of protist discovery and understanding their ecological significance.