Browsing Department of Biology by Title
Now showing items 58-77 of 195
-
The Eggshell Structures Of Ringed Turtle - Doves (Streptopelia risoria)
(Biology, 2007-08-23)The avian egg provides nutrients and protects the growing embryo from physical and microbial harm. Structures fundamental to the protection are the membrane layers, which are tightly meshed networks of collagen fibers, ... -
Element Stoichiometry Of Ochromonas danica As A Function Of Growth Rate And Temperature
(Biology, 2010-03-03)The microbial loop stresses the importance of flagellated protozoa as predators of bacteria and regenerators of nutrients, the outcome of which affects higher trophic levels. The element stoichiometry of flagellates has ... -
ELUCIDATING THE EVOLUTION OF SEX CHROMOSOME DOSAGE COMPENSATION USING BEETLES
(2021-05-04)Sex chromosomes are unique because of their role in sex determination. More importantly, sex chromosomes spend an unequal amount of time between the sexes which has significant consequences since it provides an opportunity ... -
ELUCIDATING THE MOLECULAR GENETIC BASIS OF BEHAVIORS RELATED TO THE LOSER EFFECT
(2022-09-01)Across the animal kingdom, when individuals experience social defeat (losing an aggressive conflict with a conspecific), it elicits stereotypical loser behavior such as isolation or submissiveness. In many species, social ... -
ENDOPHYTIC BACTERIA ISOLATED FROM AESCHYNOMENE INDICA PLANTS AND THEIR ROLE IN NOD-FACTOR INDEPENDENT NODULE FORMATION AND NITROGEN FIXATION
(2023-05-19)The formation of specialized root organs known as nodules is the most defining characteristic of leguminous plants due to the fixation of atmospheric nitrogen to bioavailable forms enabled by rhizobial endosymbionts. This ... -
Ensemble and Consensus Species Distribution Modeling Approaches Applied to Freshwater Fish
(2020-05-19)The field of species distribution modeling has expanded rapidly over the past two decades along with increasing computing capability and the introduction of novel analytical techniques. SDMs relate species occurrence to ... -
Environmental Regulation Of Stomate-based Defense Against Bacterial Infection in Arabidopsis
(Biology, 2011-03-03)Stomata are natural openings in the plant epidermis responsible for gas (O2 and CO2) exchange between plant interior and environment. They are formed by a pair of guard cells, which are able to close the stomatal pore in ... -
Environmental, Genetic, And Maternal Effects On Life-history Traits Of The Striped Ground Cricket, Allonemobius socius
(Biology, 2007-08-23)Organismal fitness is affected by environmental and genetic factors. More importantly, an interaction between an individual's genotype and current environmental conditions influences the success of that individual in its ... -
Evaluating Headstarting as a Conservation Strategy for Anegada Rock Iguanas (Cyclura pinguis)
(2022-06-03)In an effort to combat the current extinction crisis, conservation biologists have developed a diverse set of tools, including conservation physiology. This scientific discipline applies physiological concepts and tools ... -
Evolution of allostery and conformational dynamics of caspases involved in the extrinsic pathway of apoptosis
(2023-04-25)Caspases are a class of cysteine proteases that play a crucial role in programmed cell death (apoptosis). We complete an evolutionary picture of folding of caspases in the extrinsic pathway of apoptosis. The folding models ... -
Evolution Of Sex Ratios And Sex Determination Mechanisms: Lessons From Nematodes With Three Genders
(Biology, 2014-12)In sexually reproducing species, the decision to allocate resources towards male and female reproductive function is called sex allocation. Although theoretical and empirical work has been largely successful, the underlying ... -
EVOLUTIONARY AND BIOCHEMICAL CHARACTERIZATION OF EFFECTOR CASPASES
(2021-04-16)Caspases are an ancient class of cysteine-dependent aspartate-specific proteases that control apoptosis, responsible for cell differentiation, and maintain cellular homeostasis in multicellular organisms. Dysregulation of ... -
The Evolutionary History And Genomic Impact Of Mammalian Dna Transposons
(Biology, 2009-09-16)Transposable elements (TEs) are mobile repetitive sequences that make up large fractions of mammalian genomes, including at least 45% of the human genome. Class 2, or DNA intermediate transposons, which make up approximately ... -
Evolutionary Morphology Of The Speckled Rattlesnakes (viperidae: Crotalus Mitchellii Group)
(Biology, 2009-09-16)I examined various facets of morphological variation and evolution in the speckled rattlesnake (Crotalus mitchellii) species group. I performed three separate, but related, studies pertaining to the following topics: body ... -
Evolutionary Relationships In Some Northern Groups Of The Direct-developing Frog Genus Craugastor (Anura: Craugastoridae)
(Biology, 2012-07-25)Comparing phylogeographic patterns among vertebrates can give insight into the landscape and ecological determinants of phylogenetic diversity. However, in certain taxonomic groups (e.g., birds and mammals) natural history ... -
Explorations Of Aspects Of Mixotrophy Using Mathematical Models
(Biology, 2010-11-01)This work examined three theoretical aspects of mixotrophy, the simultaneous use of phototrophic and heterotrophic nutritional modes, and one practical application. The first study addressed the coexistence of microorganisms ... -
Feasibility For Utilization Of A Freshwater Pulmonate Snail, Physa acuta, As A Model Organism For Environmental Toxicity Testing, With Special Reference To Cadmium Ion Toxicity
(Biology, 2007-08-23)The benefits of developing the pond snail, Physa acuta, as a model species for testing acute and chronic toxicity of aquatic pollutants include its wide North American distribution, ease of field collection and laboratory ... -
The Food Habits and Feeding Behavior of New World Coral Snakes
(University of Texas at Arlington Libraries, 1973-05-01)This thesis considers the food habits and feeding behavior of New World venomous coral snakes, with emphasis on Micrurus fulvius a species that is found in the southeastern United States and northern Mexico. Literature records ... -
Functional Analysis of Nuclear-Encoded Mitochondrial Gene Duplicates with Testis-Biased Expression in Drosophila melanogaster
(2019-08-12)Most of the genes encoding proteins that function in the mitochondria are located in the nucleus and are called nuclear-encoded mitochondrial genes (N-mt genes). In Drosophila melanogaster, most of the tissue-specific ... -
FUNCTIONAL GENOMICS REVEALS THE MECHANISMS AND EVOLUTION OF EXTREME PHYSIOLOGICAL ADAPTATIONS IN SNAKES
(2021-04-28)Previous studies examining post-feeding organ regeneration in the Burmese python (Python molurusbivittatus) have identified thousands of genes that are significantly differentially regulated during this process. However, ...