Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Evolutionary transitions"”.
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Computational investigations of evolutionary transitions during development of the cellular translation and transcription machinery
Made available in DSpace on 2010-05-20T15:17:09Z (GMT). No. of bitstreams: 3 Roberts_Elijah.pdf: 13764340 bytes, checksum: 57acba078606d8ad6576a416d72ba5ac (MD5) 1_Roberts_Elijah.pdf: 13764360 bytes, checksum: 485ad430aa88441f48b2a96cec5afcdf (MD5) license.txt: 4064 bytes, checksum: …
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Revealing the transposable element dynamics driving evolutionary transitions through direct observation in live cells
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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The genetics of parallel evolution: a case study using thermal and non-thermal ecotypes of Mimulus guttatus from Yellowstone National Park
… mechanisms of adaptation has long been a goal of evolutionary biologists. However, the predictability of genetic change across adaptive events and the patterns observed during adaptive transitions across species remain poorly understood. Numerous parallel evolutionary transitions within the model …
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The genetics of parallel evolution: a case study using thermal and non-thermal ecotypes of Mimulus guttatus from Yellowstone National Park
… mechanisms of adaptation has long been a goal of evolutionary biologists. However, the predictability of genetic change across adaptive events and the patterns observed during adaptive transitions across species remain poorly understood. Numerous parallel evolutionary transitions within the model …
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Accounting for intraspecific variation transforms our understanding of artiodactyl social evolution
… of mammalian social systems has been to explain evolutionary transitions in social traits. Recent comparative analyses have used phylogenetic reconstructions to determine the evolution of social traits but have omitted intraspecific variation in social organization (IVSO) and mating systems …
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The physical, environmental, and evolutionary determinants of biological architecture
… to many dynamic habitats given specific evolutionary histories. In this thesis I will show how focusing on diverse organisms makes it possible to identify common first-order laws of evolutionary organization. More specifically I will show how these common laws derive from a connection …
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Bacterial collectives
… paradigmatic Lewontin-sense. In the framework of evolutionary transitions in individuality, such collectives must first emerge and then acquire Darwinian individuality, gaining variation, reproduction, and heredity at the collective level. Populations of Pseudomonas fluorescens SBW25 provide a …
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Call Combinatoriality in Birds
… using phylogenetic generalised least squares and evolutionary transition modelling. Recombinatoriality emerged as a significant positive predictor of repertoire size, with recombinatorial species achieving 66-68% more calls than both non-sharing groups. Contrary to efficiency-based predictions, …
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Characterization of the hermaphroditic reproductive system and sexual development in the planarian Schmidtea mediterranea
… clade, a critical group for understanding the evolutionary transitions between mating systems and the mechanisms underlying diverse modes of sex determination. To characterize the difference between asexual and sexual planarians, we performed microarray analyses to identify genes that were …
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Physical and Stochastic Aspects of Microorganism Behaviour
… on size may reveal clues to the origins of evolutionary transitions to multicellularity. We examine these issues in depth for choanoflagellates, finding that in the absence of other requirements and in a homogeneously nutritious environment, the optimal strategy to maximise filter feeding is …
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Coevolution of plastid genomes and transcript processing pathways in photosynthetic alveolates
… associated biochemistry. I have investigated how evolutionary transitions in plastid genomes may impact on biochemical pathways associated with plastid gene expression, focusing on the highly unusual plastids found in one group of eukaryotes, the alveolates. The principal photosynthetic alveolate …
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Evolutionary Origin and Maintenance of Sociality in the Small Carpenter Bees
… previously unrecognized, model for studying evolutionary transitions from solitary to social behaviour.
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The Evolution of Social Organisms: Modelling Reproduction Strategy
… study of reproduction strategy in the context of evolutionary and social-evolutionary theory. Much of the hierarchical structure that is evident in the natural world is due to major evolutionary transitions where individual subunits that once reproduced individually now reproduce only as part of a …
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The Evolution of Reproductive Complexity in Fishes
… and mating behavior, using both macro- and microevolutionary lenses. I use fishes, the most diverse group of vertebrates, comprising over 30,000 species, as a model to study the evolution of these traits.</p> <p>In Chapter 1, I introduce the evolution of parental behaviors in fishes. I present a …
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The evolutionary transition from reptiles to mammals: analyses of body size reduction and separation of middle ear elements from the jaw
… of mammalian evolution, the particular evolutionary mechanisms that underlie them are less clear. Previous studies have tested models across synapsid phylogeny prior to the origin of mammals and found little evidence for a pervasive direction bias in body size evolution. However, whether …