Results 191 to 200 of about 52,593 (216)
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An interphase model for mitotic chromosome organization in eukaryota
Biosystems, 1981A model for the spatial relationship of the arrangement of the chromosomes in the nucleus in eukaryota is presented. Evidence is derived from light and electron microscopic studies, application of autoradiographic and banding techniques; on the organization, structure and behaviour of chromosomes during interphase and other stages of cell cycle.
U C, Lavania, A K, Sharma
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2009
Abstract Resolving the tree of life for eukaryotes is an important challenge for biologists. 7is challenge has largely been taken on by molecular evolutionists because of the increasing availability and ability of genome data to resolve ancient relationships, combined with the lack of an extensive fossil record from this period in ...
Debashish Bhattacharya +3 more
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Abstract Resolving the tree of life for eukaryotes is an important challenge for biologists. 7is challenge has largely been taken on by molecular evolutionists because of the increasing availability and ability of genome data to resolve ancient relationships, combined with the lack of an extensive fossil record from this period in ...
Debashish Bhattacharya +3 more
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International Journal of Systematic and Evolutionary Microbiology, 2021
A new strain of planktonic heliozoans (ZI172) belonging to the genusMicroheliella(the sister group of Cryptista in Diaphoretickes), closely related to the only one known strain ofMicroheliella maris(CCAP 1945/1), was studied with light microscopy and SSU rRNA gene sequencing.
Yegor Shishkin +2 more
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A new strain of planktonic heliozoans (ZI172) belonging to the genusMicroheliella(the sister group of Cryptista in Diaphoretickes), closely related to the only one known strain ofMicroheliella maris(CCAP 1945/1), was studied with light microscopy and SSU rRNA gene sequencing.
Yegor Shishkin +2 more
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Light Stress Proteins in Viruses, Cyanobacteria and Photosynthetic Eukaryota
2011Plants in Nature frequently perceive environmental extremes such as light stress. To maintain their physiological functions under light stress conditions plants have developed different protection strategies that operate at morphological, anatomical and subcellular levels.
Mounia Heddad +2 more
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Light- and Electron-microscopical Study of Belonocystis marina sp. nov. (Eukaryota: incertae sedis)
Protist, 2016BelonocystisRainer, 1968 is an enigmatic protist genus, which currently lacks any supergroup affiliation. The spherical cells of this organism move on the substratum using fine non-branching pseudopodia. The cell surface is surrounded with a spiky covering. Belonocystis marina sp. nov. was studied using light- and electron microscopy.
Vladimir I, Klimov +1 more
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Alternative pathway (cyanobacteria to eukaryota)
1994It is quite evident from the fossil record that prokaryotic cells were the first cell type evolved. After a long interval of nearly two billion years eukaryotic cells appeared. There is little doubt that this cell type arose from the bacterial cell. How this occurred has been the subject of much speculation.
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European Journal of Protistology, 1999
Summary The ultrastructure of Carpediemonas membranifera , a small flagellate isolated from marine intertidal sediments, is presented for the first time. This protist has two flagella inserting at the anterior end of a feeding groove. The posterior flagellum bears three vanes. The cell has an anterior nucleus, a single dictyosome and a hydrogenosome-
Alastair G.B. Simpson +1 more
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Summary The ultrastructure of Carpediemonas membranifera , a small flagellate isolated from marine intertidal sediments, is presented for the first time. This protist has two flagella inserting at the anterior end of a feeding groove. The posterior flagellum bears three vanes. The cell has an anterior nucleus, a single dictyosome and a hydrogenosome-
Alastair G.B. Simpson +1 more
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The hybrid nature of the Eukaryota and a consilient view of life on Earth
Nature Reviews Microbiology, 2014The origin of the eukaryotic cell, which is known as eukaryogenesis, has puzzled scientists for more than 100 years, and many hypotheses have been proposed. Recent analyses of new data enable the safe elimination of some of these hypotheses, whereas support for other hypotheses has increased.
McInerney, James O +2 more
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Evoluce skupiny Retortamonadida (Eukaryota: Excavata: Fornicata)
2010Retortamonads (Retortamonadida; genera Chilomastix and Retortamonas) are a small group of protists comprising intestinal commensals of both vertebrates and invertebrates and one free-living species of the genus Chilomastix. Molecular phylogenetic studies showed that retortamonads are closely related to diplomonads, Carpediemonas, Dysnectes ...
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Origin of eukaryota from Cyanobacterium: membrane evolution theory
1994It has been currently estimated that the life generated about four billion years ago in the primitive sea as a result of the chemical evolution. There is no doubt that, at that time, the protoorganism was a prokaryotic monad, formed from a certain aggregate of primitive proteins, nucleic acids, and other macromolecules and wrapped with (phospho)lipid ...
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