Browsing Department of Biology by Title
Now showing items 141-160 of 195
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Rate Of Diversification In Crickets (Orthoptera: Ensifera) And A Possible Role Of F Supergroup Wolbachia In Bush Crickets
(Biology, 2007-09-17)Part I: Rates of speciation can tell us more than how many species have survived over a period of time. They indicate whether there are some characteristics of organisms or biogeography scenarios facilitate or hinder ... -
Rattlesnake genomics illustrate patterns of speciation, adaptation, and links between genome structure and function
(2019-08-13)Understanding the origins of species and biological novelties that allow them to thrive in diverse environments is a key goal in evolutionary biology, and new genomic methods are constantly enabling research using non-model ... -
Rcd-1 Related:a Positively Selected Retrogene With Spermatogenesis Function In Drosophila
(Biology, 2008-04-22)Gene duplication is one of the major forces in driving genome evolution. Our study focuses on a particular retrogene Rcd-1 related (Rcd-1r) that originated through retroposition of the parental gene Required for cell ... -
The Relationship Of Oribatid Soil Mite Abundance To Abiotic And Biotic Factors
(Biology, 2008-08-08)Oribatid soil mites primarily feed on fungi and dead organisms. They belong to the arthropod subclass, Acari, that are believed to contribute to soil processes such as plant litter breakdown and nutrient release. In order ... -
Reproductive Behaviors Of Two Congeneric, Sympatric Jumping Spiders: Gene Flow Barriers And Polyandry
(Biology, 2007-08-23)This two part study compares aspects of jumping spider reproductive behavior and their implications 1) as gene flow barriers during the process of speciation and 2) in the occurrence of polyandry. Courtship behaviors of ... -
Reproductive Isolation In Drosophila: From Behavior To Genome
(Biology, 2010-11-01)In this study, I investigate factors underlying reproductive isolation in Drosophila. I begin (Part I) by measuring behavioral isolation between Zimbabwe and cosmopolitan D. melanogaster, and asking the following questions: ... -
RESPONSE OF MICROBIAL NETWORKS AND MICROBIOMES TO THE FOREST-TO-PASTURE CONVERSION IN AMAZON SOILS
(2016-11-30)The Amazon rainforest is the largest tropical rainforest ecosystem in the world, and an extremely important region ecologically. Due to the growing human needs mainly for cattle ranching and cultivation, the rainforest has ... -
The Role Of Life History In The Toxicity Of The Toxic Golden Haptophyte Prymnesium parvum
(Biology, 2013-03-20)Prymnesium parvum is a harmful algal species that causes widespread fish kills. It is usually motile, but non-motile stages have been observed that may represent an encysted stage. The relationship of these life history ... -
Role Of Repetitive DNA In Apicomplexan Genome Evolution
(Biology, 2010-07-19)The Apicomplexa represent a phylum of obligate intracellular parasites that impart significant medical, veterinary, and socioeconomic burdens worldwide. The opportunistic, AIDS-associated, pathogen Toxoplasma gondii for ... -
Role Of The Extracytoplasmic Function Sigma Factor carQ In Oxidative Response Of Bradyrhizobium japonicum
(Biology, 2013-10-23)Bradyrhizobium japonicum is a nitrogen-fixing bacterium that can establish a symbiotic relationship with the soybean plant. To be a successful symbiont, B. japonicum must have an effective mechanism to deal with plant ... -
Saponins As Agents Preventing Infection Caused By Waterborne Pathogens
(Biology, 2013-10-23)Waterborne diseases are the leading cause of deaths globally, estimated to result in more than 3.4 million deaths and approximately 4 billion cases of diarrhea annually according to the World Health Organization (WHO). The ... -
Seasonal And Habitat-based Prey Diversity Of Bobcats, Lynx Rufus, In Big Bend National Park, Texas
(Biology, 2014-07-14)The bobcat (Lynx rufus) population in Big Bend National Park (BIBE) provides an excellent opportunity for study due to the varied arid habitat in which they exist, the dynamic nature of their environment, and the paucity ... -
Sequence Evolution Of Recurrently Recruited Retroposed Genes In Drosophila And Their Possible Role In Meiotic Drive
(Biology, 2009-09-16)Gene duplications are a valuable source of genetic information that can evolve under positive selection creating a new gene function without affecting the original function.A gene duplication mechanism is retroposition. ... -
Sex, War And Disease: The Effects Of Infection On Horn Size And Intra-sexual Competition In The Broad-horned Flour Beetle, Gnathocerus cornutus
(Biology, 2010-03-03)Sexual selection is widely used to explain the evolution of mating systems where most often it is manifest as the competition among males for access to females. This competition takes the form of direct male-male interactions ... -
Signatures of Genome Evolution in Two Divergent Lizard Species from Texas
(2022-08-31)The continual reduction of the cost of high-throughput sequencing is now making it feasible to sequence large genomic and transcriptomic datasets for non-model organisms. Many of these under study non-model organisms have ... -
The Spatial Ecology Of The Comanche Harvester Ant, Pogonomyrmex comanche (Hymenoptera: Formicidae)
Because of the diverse roles ants play, it has been suggested that ants may be ecosystem engineers and so, may be useful in monitoring ecosystem function and health. Because ant activities are localized around their nests, ... -
Species Limits And Phylogenetic Systematic Of The Diurnal Geckos Of The Genus Gonatodes (Squamata: Sphaerodactylidae)
(Biology, 2008-09-17)The genus Gonatodes (family Sphaerodactylidae) is a diverse of group of about 20 species currently recognized of mostly diurnal geckos that are collectively distributed from southern Mexico to Brazil and Bolivia, and also ... -
A Sticky Situation: Functional Responses Of Mast Cells To Acidic pH
(Biology, 2008-04-22)Precise regulation of extracellular pH is critical for proper function of many cellular activities. Minor fluctuations in pH can have profound effects on ion transport, receptor function, and cellular secretions. This work ... -
Stream Biodiversity and Co-occurrence Network Topology along Sub-continental to Global Nutrient and Land Use Gradients
(2020-07-21)Freshwaters are some of the most vulnerable ecosystems to global change forces, such as land use and eutrophication, implicated in the loss of biodiversity and biotic homogenization (increased similarity) of species ... -
Stress Response Pathways and the Origins of Novelty: How Snakes Regenerate Organs and Regulate Venom
(2023-05-11)**Please note that the full text is embargoed until 05/11/2024** ABSTRACT: Snakes have captured evolutionary biologists’ attention for decades as extreme examples of adaptive evolution models for studying how novel and ...