Search for dissertations about: "molekylär evolution"
Showing result 16 - 20 of 124 swedish dissertations containing the words molekylär evolution.
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16. Divisive structures : Two billions years of biofilament evolution
Abstract : Our understanding of the functional and regulatory complexity that existed in the eukaryotic progenitor is poor, and investigations have been hindered by our nebulous understanding of where eukaryotes stem from. Recently discovered archaeal lineages with hitherto unseen homology to eukaryotic systems suggest archaea can further our understanding of the eukaryotic cell’s ancestry. READ MORE
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17. Exploring the diversity and evolution of giant viruses in deep sea sediments using genome-resolved metagenomics
Abstract : Viruses are the most abundant biological entities on this planet, which is impressive considering that they are completely dependent on their hosts for reproduction. Recently the idea of what viruses are has changed dramatically, with the discovery of giant viruses that belong to the Nucleocytoplasmic Large DNA Viruses (NCLDV), such as Mimiviridae, Marseilleviridae, and the proposed families Pandoraviruses, and Pithoviruses. READ MORE
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18. Mitochondrial and Eukaryotic Origins : A Phylogenetic Perspective
Abstract : Mitochondria are eukaryotic cellular organelles responsible for power-generation, believed to have come into existence by an endo-symbiontic event where a bacterial cell was incorporated by an un-specified "proto-eukaryote". Phylogenetic analysis have shown that the mitochondrial ancestor was most related to present-day alpha-proteobacteria, although the exact nature of the mitochondrial progenitor remains disputed. READ MORE
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19. Patterns and Processes of Molecular Evolution in Rickettsia
Abstract : Species of the genus Rickettsia are obligate intracellular parasites of the a-proteobacterial subdivision. It has been suggested that obligate intracellular bacteria have evolved from free-living bacteria with much larger genome sizes. READ MORE
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20. Genome Evolution and Niche Differentiation of Bacterial Endosymbionts
Abstract : Most animals contain chronic microbial infections that inflict no harm on their hosts. Recently, the gut microflora of humans and other animals have been characterized. However, little is known about the forces that shape the diversity of these bacterial communities. READ MORE