Biology Commons^™

The Fetal Position: An Examination Of The Validity Of Gender Through The Lens Of Ecological Fluidity Of Behavioral Dimorphisms, Tanya Daughtry

Dialogue & Nexus

Sex and gender is not dichotomous as traditionally thought. Once the biology of sex is understood, perhaps a correction of the teaching about male and female uniqueness can be balanced with Jesus’ teaching regarding eunuchs. Until this is done, persons with gender identity discontinuities will be marginalized by the church. Recognizing that this dichotomous view is incorrect is the first step in correcting the marginalization.

Passive Euthanasia, Jennifer Hulett, Madeline Peterson

Dialogue & Nexus

The controversy of passive euthanasia (e.g. the withholding or withdrawing of life-sustaining treatments in patients that are either disabled or terminally ill) has been long-debated because, it has been argued, passive euthanasia violates the physician’s Hippocratic Oath to do no harm to the patient. This withholding or withdrawal can include one or more of the following: ventilators, feeding tubes, and life support. In this paper we will explore the major debate points of passive euthanasia in light of four ethical theories: utilitarianism, virtue ethics, Kantian, and evolutionary ethics.

Theodicy Through The Lens Of Darwin, Zach Moore

Dialogue & Nexus

Any theodicy is often fraught with difficulties. The two major families identified are Augustinian theodicy and Irenaean theodicy, named after these two early church fathers. These two perspectives are widely accepted accounts of theodicy and represent a general theological approach to the problem of evil. We will explore the insufficiency of these perspectives in light of evolutionary considerations and, in the end, disappointingly, call for an as yet developed theodicy to be offered.

Divine Action And Teleology In An Evolutionary World, Emily Sparks

Dialogue & Nexus

In this paper I explore three possibilities: 1) whether or not there is room for divine action in a dynamic, undetermined, evolutionary world; 2) if divine action is necessary to explain the outcome of creation; and 3) if there is purpose (e.g. teleology) in such a world. I will address the implications of indeterminacy, parts-and-whole behavior (or emergence), and directionality for divine agency. Models of God’s action informed by these trends will be provided. Finally, I will explain the teleological implications of these discoveries and God’s action and conclude with implications to the Christian faith.

Altruism: Biological Rationale Vs. Christian Love Command, Chris Porter, Landry Guin

Dialogue & Nexus

The idea of altruism and self-sacrifice appears counter to a simple view of evolution. While a “survival of the fittest” mindset occurs in some Darwinian views, there are counter-examples of animals and humans with cooperative, pro-social, and even self-sacrificial behavior. Social animals such as bees and ants work for the community and provide for the queen due to a haploid-diploid system of genetic relatedness. Some humans sacrifice their lives and money to promote the well-being of others even without genetic relatedness and, rarely, without reciprocity. We will explore why human animals often help people who are less fortunate by giving …

Neuroscience And Experience Of God: The Validity Of God’S Presence In Individual Religiosity, Morgan Shamblin

Dialogue & Nexus

Humans have postulated the existence of a transcendent soul capable of interacting with higher being (e.g. God). This soul has no physical limitations and may persist beyond time and space. Likewise, this non-physical component of personhood allows the presence of God to infiltrate the mind to produce genuine religious experiences with such a higher being. In contrast, the physicalist position of neurobiology seeks to attribute religious feelings and experiences to neurochemicals and the precise firing of neurons; the brain is the beginning and end of all religiosity. On the one hand, the idea is that human beings are nothing but …

Intelligent Design And Creationism In Our Schools, William Travis Kern

Dialogue & Nexus

I describe and elaborate what both ID /Creationism and evolution , and their respective claims, are. I also explain which are allowed in a high school science classroom. Before one can decide whether any view belongs in the science classroom, one must know what the basis is for claiming any explanation in science; this is particularly important when dealing with origins . Finally, I will explain the legal precedence for understanding why ID and Creationism cannot be included in any science class. It may, however, still be included in the curriculum by teaching them in a humanities class.

The Effects Of Thyroid Hormone On Corneal Innervation, Vendana (Jill) Rajarathnam, Mansi Patel, Shinho Kim, Ngan Phan, Tyler Schwend, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

The Bioinformatic Analysis Of A Cluster S Mycobacterium Smegmatis Bacteriophage Tesla, Janna Fitzgerald, Zoephia Laughlin, Colin Page, Bailey Reichert, Richard Alvey, Faculty Advisor, David Bollivar, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Brachionus Plicatilis Ability To Ingest, Digest, And Assimilate Dissolved Organic Matter, Brianna Miulli, William Jaeckle, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

The Genomic Investigation And Analysis Of Squint, A Novel J Cluster Mycobacteriophage, Tulasi Jaladi, Jessica Keen, Morgan Reish, Andria Talavera, Richard Alvey, Faculty Advisor, David Bollivar, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

The Isolation, Purification, And Characterization Of Fourteen Mycobacterium Smegmatis Bacteriophages, Marissa Alcala, Alecia Beagles, Caroline Marchi, Samantha Ziomek, Richard Alvey, Faculty Advisor, David Bollivar, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Development Of A Low-Cost Platform For 3d Bioprinting Applications, Anthony Emanuel, Fernando Ontiveros

Undergraduate External Publications

Due to the fast pace advancements in 3D printing technologies, it is now possible to bring to life three-dimensional models designed on a computer. The growing availability of user-friendly, high-resolution printers, presents us with the opportunity to adapt this tool for multiple biological purposes. Our aim is to develop a mechanism on a customized commercial 3D printer to deliver a hydrogel material to act as a scaffold for cell proliferation. Compared with non-biological printing, 3D bioprinting involves several complexities, such as the choice of materials, cell types, growth and differentiation factors, and technical hurdles related to the sensitivities of living …

Mating Patterns And Post-Mating Isolation In Three Cryptic Species Of The Engystomops Petersi Species Complex, Paula A. Trillo, Andrea E. Narvaez, Santiago R. Ron, Kim L. Hoke

Biology Faculty Publications

Determining the extent of reproductive isolation in cryptic species with dynamic geographic ranges can yield important insights into the processes that generate and maintain genetic divergence in the absence of severe geographic barriers. We studied mating patterns, propensity to hybridize in nature and subsequent fertilization rates, as well as survival and development of hybrid F₁ offspring for three nominal species of the Engystomops petersi species complex in Yasuní National Park, Ecuador. We found at least two species in four out of six locations sampled, and 14.3% of the wild pairs genotyped were mixed-species (heterospecific) crosses. We also found reduced …

Comparison Of Physiological Measurements And Water Potential Of Malosma Laurina During And After The Drought In Southern California, Nicolette Jessen, Kirstin Van Fleet, Rachel White

Featured Research

After 5 years of drought, southern California has recently experienced increases in precipitation. Malosma laurina is a chaparral shrub that displays vulnerability to fungal infection during severe drought conditions, particularly in its adult branches, resulting in severe dieback throughout the Santa Monica Mountains. M. laurina is known to produce resprout leaves during times of environmental stress that are less affected by the fungus based on its ability to maintain water status and thus are more capable of displaying resilience in more favorable environmental conditions. We hypothesize that the increase in rain will not be enough to alter the vitality of …

Does High Relatedness Promote Cheater-Free Multicellularity In Synthetic Lifecycles?, R F. Inglis, E Ryu, O Asikhia, Joan E. Strassmann, David C. Queller

Biology Faculty Research

The evolution of multicellularity is one of the key transitions in evolution and requires extreme levels of cooperation between cells. However, even when cells are genetically identical, noncooperative cheating mutants can arise that cause a breakdown in cooperation. How then, do multicellular organisms maintain cooperation between cells? A number of mechanisms that increase relatedness amongst cooperative cells have been implicated in the maintenance of cooperative multicellularity including single-cell bottlenecks and kin recognition. In this study, we explore how relatively simple biological processes such as growth and dispersal can act to increase relatedness and promote multicellular cooperation. Using experimental populations of …

Where The Wild Things Are: Investigating Body Size As A Mechanism For Persistence, Meghan Anne Balk

Biology ETDs

Body size is a trait under selection. Genetic drift, climate, diet quality, and biotic interactions all select upon body size at the population, species, and community levels. These factors can be important in the context of rapidly changing climate. One of the ways an animal can persist in its environment is through morphological adaptation in situ. Here, I investigate four questions relating to the evolution of body size: (1) what is the limit in body size change in response to climatic change; (2) how does body size influence the thermal tolerances of animals; (3) how does body size evolve …

Unexpected Nongenetic Individual Heterogeneity And Trait Covariance In Daphnia And Its Consequences For Ecological And Evolutionary Dynamics, Clayton E. Cressler, Stefan Bengtson, William A. Nelson

School of Biological Sciences: Faculty Publications

Individual differences in genetics, age, or environment can cause tremendous differences in individual life-history traits. This individual heterogeneity generates demographic heterogeneity at the population level, which is predicted to have a strong impact on both ecological and evolutionary dynamics. However, we know surprisingly little about the sources of individual heterogeneity for particular taxa or how different sources scale up to impact ecological and evolutionary dynamics. Here we experimentally study the individual heterogeneity that emerges from both genetic and nongenetic sources in a species of freshwater zooplankton across a large gradient of food quality. Despite the tight control of environment, we …

Uncovering Transcriptional Activators And Targets Of Hsf-1 In Caenorhabditis Elegans, Jessica Brunquell

USF Tampa Graduate Theses and Dissertations

In order to survive, cells must be able to cope with a variety of environmental stressors. The heat shock response (HSR) is a pro-survival mechanism employed by cells in response to protein denaturing stress, such as heat. Since its discovery in 1960, the heat shock response has been found to be regulated by the transcription factor heat shock factor 1 (HSF1). During periods of increased stress, HSF1 undergoes a multi-step process of activation that involves homotrimerization, DNA-binding, and post-translational regulatory modifications, all of which ultimately function to control the transcription of chaperone genes. These chaperone genes encode molecular chaperone proteins …

Quantitative Evaluation Of Clinostomum Marginatum Distribution In The Fish Host (Perca Flavescens): Investigation Of The Impact On Functional Performance, Doiba Ki Eshofonie, Precious Freeman

Student Scholar Showcase

Doiba Eshofonie & Precious Freeman

Mentor: Takashi Maie

2017 Student Scholar Showcase

Quantitative evaluation of Clinostomum marginatum distribution in the fish host (Perca flavescens): Investigation of the impact on functional performance

Clinostomum marginatum is a trematode commonly found in freshwater fish. The adult C. marginatum stays in its definitive avian host’s mouth and throat. It releases eggs upon contact in water and the eggs hatch into a free-swimming miracidia, which infects an aquatic snail as the first intermediate host. The miracidia, then, develops into a cercaria and leaves the snail to find a fish as its second intermediate …

Accounting For Spatial And Temporal Variation In Macroinvertebrate Community Abundances When Measuring The Food Supply Of Stream Salmonids, Nicholas Weber, Nicolaas Bouwes, Chris Jordan

Watershed Sciences Faculty Publications

The goal of salmonid habitat monitoring programs is to measure habitat attributes linked to salmonid productivity based on protocols that have sufficient precision to detect environmental variation at relevant spatial and temporal scales. Benthic macroinvertebrate community composition often is evaluated as part of habitat monitoring and assessment protocols, despite a lack of direct relationships between benthic composition and salmonid production. Macroinvertebrate drift provides a direct measure of the food resources available to stream salmonids, but drift is rarely evaluated as part of habitat monitoring protocols. This reluctance may stem from the complex spatial and temporal variability inherent in macroinvertebrate drift …

Inquiry Into Perilipin-5a Expression In Triacylglycerol Rich Vs Normal Fed Mouse Tissue, Kobi Agyepong

Undergraduate Honors Thesis Projects

The steep rise in both childhood and adult obesity over the past three decades has moved to the forefront of public consciousness in recent years. This development has generated a marked increase in general health awareness and lifestyle changes for a vast number of individuals, most notably in the form of increased physical activity and diet alterations. The latter point is especially salient in a biochemical context, because of the myriad factors that can result in “fat accumulation”. Chief among these factors is the Perilipin 5A gene, (known as PLIN5A) which encodes the protein Perilipin 5A of the Perilipin family …

Adaptive Evolution Under Favorable And Unfavorable Population Genetic Conditions In Caenorhabditis Elegans Nematodes, Stephen Fuller Christy

Dissertations and Theses

Mutation is a fundamental process that drives evolutionary change; however, most new mutations are deleterious for organismal fitness and can readily propagate within populations under a broad range of conditions. Mutational processes able to counteract deleterious mutation accumulation include: 1) reversion mutation back to wildtype, 2) acquisition of generally beneficial mutations, and 3) compensatory mutations that specifically mitigate the effects of previously-acquired deleterious mutations through epistasis. The potential for any of these mutation types alters our expectations for the impact of deleterious mutation in populations, but since the fitness effects of individual mutations are rarely characterized, the relative importance of …

Furman University Lake Restoration Project

Furman Lake Restoration Book Gallery

An overview of the Furman Lake Restoration Project. The overview includes photographs and charts. It provides information on the history of the Furman Lake, it's environmental health decline throughout the years, and the lake's restoration. The overview details the Furman Lake's problems, causes of these problems, and solutions. It describes Furman's progress in the restoration project, as well as it's goals for the future.

Soil Sand Content, But Not Solil Myrosinase Enzyme Activity, Affects Mam Efficacy In Suppressing Weed Growth, Warit Chirachevin

Honors Theses

Mustard seed meal (MSM) has been shown to control weeds and pests in crop fields. Prior work showed that a sandy loam soil was superior to a silt loam soil in supporting velvetleaf growth suppression by MSM. To explore this difference, myrosinase enzyme activity was measured in both soils. Results showed no significant difference between the soils. Sand content in Michigan silt loam soil was manipulated in order to test the role of sand content on MSM efficacy in suppressing short-term velvetleaf growth. Results showed that sand enhanced the effect of MSM in suppressing seedling growth and germination.

Chelerythrine Chloride And Its Effects On Phonotactic Behavior In Female Crickets Acheta Domesticus, Haneul Shin

Honors Theses

Selective phonotaxis by female crickets has been shown to be variable. Mechanisms which underlie such behavioral variability are being studied. Juvenile Hormone III is a neuromodulator that has been shown to increase selectivity in phonotactic behavior of female crickets. In an attempt to further explore its effects on the behavioral responses of femaile crickets, experiments have been performed with chelerythrine cloride that is known to have an opposite effect of Juvenile Hormone III. Chelerythrine chloride, a potent protein kinase C blocker, has been hypothesized to block the effect of Juvenile Hormone III which acts through a protein kinase C pathway, …

The Relationship Between Cold Stress Syndrome Mortality And Body Shape In Florida Manatees, Purin Chirachevin

Honors Theses

West Indian manatees (Trichechus manatus latirostris) are tropical and subtropical aquatic mamals that can develop cold stress syndrome (CSS) when subjected to water temperatures below 20'C for prolonge dperiods. This study investigtes the potential impact that cold winter water temperatures in Florida may have on manatee body shape as a selective force to reduce surface-area-to-volume ratio (SA:Vol; i.e. Bergmann's and Allen's Rule). Morphometric measurements collected from state-mandated necropsies (1974-2014) were used to calculate surface area, volume, and mass. We found that manatees that died of CSS on average had significantly greater SA:Vol and less mass compared to those that died …

Synthesis Of A-Cyanostilbenes And Testing Of Their Anticancer Properties, Gabrielle Cook

Honors Theses

This research project involves synthesizing cyanostilbenes and testing their anticancer properties in breast cancer cells. Breast cancer is a global issue, one that great improvement has been found in the last few decades, but also one that remains a large killer. The components of the cyanostilbene hybrids have all been shown to have anticancer properties on their own, and we would like to see if we can increase these properties by combining multiple into a single hybrid. Then these cyanostilbene compounds are tested on Her2+ human breast cancer cells. The goals is to assess whether or not the cyanostilbenes have …

Natural Products In Weed Control: Allyl-Isothiocyanate Effects On In Vitro Velvetleaf Seedling Growth And The Influence Of Mustard Seed Meal On Soil Bacterial Populations, Stanford Shin

Honors Theses

Past research has shown that alyl isothiocyanate (AICT) and its sister ITC compounds are effective alternatives to herbicides in reducing growth in weed seedlings. In this project the effects of mustard seed meal (MSM), a source of AITC, on plant-associated soil bacteria populations was assessed along with the effect of AITC on velvetleaf seed in vitro germination. Results show that MSM reduces bacterial levels in the soil. Velvetleaf seed germination was inbibited by micromolar levels of AITC. These results suggest that MSM has the potential to impact velvetleaf growth in the field as well as becoming a weed management tool.

The Role Of Octopamine In Syllable-Period Selective Phonotaxis In Female Cricket Acheta Domesticus, Darley Magno

Honors Theses

Female crickets respond phonotactically to the calls of conspecific males. Females' phonotaxis has been reported to be variable, ranging from unselective to selectve in response to calls with varying syllable periods (30-90 ms). Octopamine, an intertebrate neurotransmitter, has been reported to increase aggressive behavior in crickets, (Stevanson et al. 2005) but the effects of octopamine on behaviors such as phonotaxis have not been investigated. The goal of this study is to determine the effects of octopamine on the syllable-period selective phonotactic response of females. Results suggest a decrease in phonotactic responsiveness shown by 5-10 day-okds after prothroacic nanoinjection of octopamine.