Social and Behavioral Sciences Commons^™

Mate Guarding Against Strong Men Displaying Affiliative And Aggressive Humor, Jacob Pauley

Biological Sciences Undergraduate Honors Theses

Mate retention behaviors serve to discourage partner defection from a current pairbond. Such behaviors are oftentimes more prevalent toward intrasexual rivals exhibiting physical and behavioral cues implicating that rival as an optimal mate. Among these features in men are their upper body strength, a feature diagnostic of heritable fitness, and men's ability to produce humor, a cue to their social competence. This study considered the intersection of these desirable features in shaping men's mate retention behavior toward an intrasexual rival. After learning of a hypothetical interloper exhibiting high or low upper body strength while similarly using humor in an affiliative …

The Effect Of Hormonal Contraceptive Use On Dominance And Prestige Tactics, Carson Chappell

Biological Sciences Undergraduate Honors Theses

This study was designed to investigate the relationship between hormonal contraceptives and prestige and dominance status-seeking tactics. Existing literature has examined how the hormones estrogen and progesterone, especially in relation to the fertile window of the menstrual cycle, are associated with prestige and dominance but has yet to look in depth at how hormonal contraceptives might alter this impact. The current study asked participants to complete a 22- item questionnaire assessing dominance and prestige. I hypothesized that women on hormonal contraceptives would have lower scores for prestige and dominance compared to women who are naturally cycling. The results did not …

Structural Formation And Functionality Of The Spoiie Protein In Clostridium Difficile, Rachel Siebenmorgen

Biological Sciences Undergraduate Honors Theses

My research efforts were directed toward the structure and functionality of a protein, designated SpoIIE [11], which previously has been shown to regulate C. difficile peptide utilization in addition to sporulation and toxin release. The SpoIIE protein is found in all spore-forming gram-positive bacteria and is a crucial component in activation of transcription factors and septum formation thus affecting the regulation and timing of spore development [11,12]. A truncated form of the SpoIIE protein named SpoIIE∆TM was used in an effort to determine the structure of an important but uncharacterized linker domain of the protein. If the structure and specific …

Examining Difference In Social Perceptions Between Women Using Hormonal Contraceptives And Naturally Cycling Women, Caroline B. Johnson

Biological Sciences Undergraduate Honors Theses

The term “stress” refers to a person’s psychological and physiological response to the demands and pressures of the world around them (Farlex, 2021). Past research has shown that stress can have negative side effects on a person’s well-being (Aneshensel et al., 1991; Wunsch et al., 2017; Michie, 2002). Although people experience stress, some people perceive more stress than others. Perceptions are important because the way one understands certain conditions can elicit distinct emotional and physiological responses (Kemeny, 2003). An important factor that has not received a lot of attention is women’s use of hormonal contraceptives. In the United States, 24.4% …

Effect Of Larval Rearing Environment On Female Bicyclus Anynana Mate Choice, Adriana Beruvides

Biological Sciences Undergraduate Honors Theses

Around eighty percent of animals go through metamorphosis or drastic phase changes at some point in their life. We know that juvenile interactions can influence adult behavior and mate choice in species that don’t go through metamorphosis, but we know very little about how social interactions during early life stages of animals who go through metamorphosis affect mate choice. To fill this knowledge gap, I used the butterfly Bicyclus anynana to assess whether female butterflies raised in complete isolation from the beginning of their lives exhibit the same mate preference as butterflies raised in normal social conditions. To test this, …

The Effects Of Time Restricted Feeding On Markers Of Type 2 Diabetes, Brooke Martin

Biological Sciences Undergraduate Honors Theses

Type 2 diabetes is one of the fastest growing chronic diseases in the country, comprising 10% of the American population. Obesity rates are at an all-time high and greatly increase risk factors for developing diabetes. Insulin resistance is the main feature of type 2 diabetes and causes management of the disease to be extremely difficult. Currently there are different possible treatments for type 2 diabetes including medication and dieting. However, diets involving fasting, though high in popularity, do not have a lot of evidence regarding their ability to prevent the development of type 2 diabetes.

Time restricted feeding (TRF) is …

Regulation Of The Reaction Between Cytochrome C And Cytochrome C Oxidase In The Mitochondria, Anders Nowell

Biological Sciences Undergraduate Honors Theses

Cytochrome c (Cc) is a multifunction protein that has important life and death functions in the cell. In the electron transport chain (ETC), Cc transfers electrons from cytochrome bc₁ to cytochrome c oxidase (CcO), which helps build the electrochemical gradient that drives ATP synthase. The reaction of Cc with CcO is very important in ETC regulatory processes. Previous research shows phosphorylation sites in Cc that affect the binding with CcO, with measurable effects on k_d, k_f, and K_D. These effects result in changes in mitochondrial membrane potentials, respiration, and reactive oxygen species (ROS) …

Using Ai To Examine Nocturnal Moth Pollination, Conor Moriarty

Biological Sciences Undergraduate Honors Theses

The importance of insect-mediated agriculture cannot be understated especially in the wake of pollinator population declines. Most research of insect-mediated pollination is focused on diurnal pollinators like the honeybee (Apis mellifera). Deepening our understanding of how other pollinators, such as nocturnal pollinators, can benefit agriculture and ecosystems will be very important as honeybee populations decline. I explored nocturnal moth interactions with flowering apple flowers during their pollination season to better understand how these nocturnal pollinators interact with the plants. To accomplish this, I used a University of Arkansas farm area with a dedicated apple orchard. I gathered my raw data …

Quantification Of Dental Fissures Through Occlusal Topography Analysis, Duru Erkan

Biological Sciences Undergraduate Honors Theses

Narrow, deep, and elaborate dental fissures are widely believed to increase the predisposition of enamel to develop carious lesions as these surfaces are thought to be ideal for cariogenic bacteria to adhere to. Therefore, dentists prescribe sealants as a preventative measure for patients with such fissures to avoid tooth decay. Yet to date, there is no objective data supporting the notion that fissure morphology actually affects caries susceptibility, nor is there a quantifiable, clinically practical method to characterize fissure patterns expected to increase risk of caries disease.

In this study, three new methods to quantitatively characterize fissure pattern in mandibular …

The Influence Of Temperature And Body Size On Food Consumption In Prairie Lizards (Sceloporus Consobrinus), Morgan Pelley

Biological Sciences Undergraduate Honors Theses

Understanding the effect of temperature on physiological and digestive processes, such as voluntary consumption rate, is critical for assessing the impact of climate change. Food consumption is required for lizard survival and reproduction and its rate is dependent on temperature. For ectotherms, as temperatures increase, the amount of food consumed to meet the energy requirements related to survival and reproduction must also increase. Information on the amount of food voluntarily consumed may aid in determining if lizards can meet energy requirements. Such information could also aid in predicting survival of lizard populations, through construction of predictive climate change models. In …

How Flow Regime Affects Predator-Prey Relationships Of Stream Darter And Shiner Species, Anna E. Richardson

Biological Sciences Undergraduate Honors Theses

Analysis of the interactions between abiotic and biotic factors of environments and ecosystems is a highly valued area of research. This study focuses on the interactions between the biotic component of predation and foraging of certain stream fish species and the abiotic component of the flow regime that those species reside in. Gut content analysis followed by statistical calculations in the form of t-tests and chi -quared tests were performed on two fish species who both inhabited a stream with a groundwater flashy flow regime as well as a stream with a runoff flashy flow regime. The research showed that …

Elevated Levels Of External Cysteine Inhibit Nitrogen Fixation By The Methanogenic Archaeon Methanosarcina Acetivorans, Regan Massey

Biological Sciences Undergraduate Honors Theses

Methanogens are nitrogen fixing and methane producing archaea that play a key role in the cycling of carbon and nitrogen on earth. The global carbon and nitrogen cycle is vital to all life which makes the methanogen a primary organism of study. Methanogens are the only archaea capable of fixing nitrogen, and in order to do so, methanogens use a vital enzyme called the nitrogenase which fixes dinitrogen (N2) to ammonia (NH3). Expanding our understanding on metabolic processes of methanogens allows us to understand their environmental impact and advance their use in biotechnological applications. Methanosarcina acetivorans is the model used …

Spike Protein Structural Dynamics Of Sars-Cov-2 Coronaviruses Studied Using Molecular Dynamics, William Strickland

Biological Sciences Undergraduate Honors Theses

Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has overwhelmingly impacted the global population, accounting for millions of confirmed infections and deaths over the last year. The virus’s influence on the health and safety of individuals, the economy, and daily life has been disruptive and devastating. While SARS-CoV-2 and SARS-CoV-1, two closely related members of the SARS coronaviruses, have shown the ability to cross the species barrier and infect humans, SARS-CoV-2 has predominantly been the virus responsible for the number of infections presently known. SARS-CoV-2 has also proven to be volatile, as many variants have …

Exploring Nitrogen Fixation In Methanosarcina Acetivorans, Rylee Cook

Biological Sciences Undergraduate Honors Theses

As of 2016, the genomes of over sixty species of methanogenic archaea have been sequenced.4 Research on the genomes of methanogens such as M. acetivorans led to the characterization of numerous genes with unknown functions. Genes similar to those of nitrogenase have been shown to possess functions unrelated to nitrogen fixation, such as F430 biosynthesis genes. 5,6,7 My research focused on the uncharacterized gene clusters ma2032-33 and ma1631-33 (Figure 1). These genes have conserved nitrogenase domains: ma2032 has fused nifH and nifD domains, while ma2033 has a nifD domain. The ma1631-33 gene cluster contains two nitrogenase homologs and one iron …

Effect Of Larval Experience On Learning Mate Preference In Bicyclus Anynana, Taryn Tibbs

Biological Sciences Undergraduate Honors Theses

Phenotypic traits are shaped by the interaction of an organism's genes and the environment they experience. The plasticity of phenotypic traits is particularly responsive to developmental environments which can shape adult traits, such as expressed behaviors like mate choice and the ability to learn preferences. The Lepidoptera species Bicyclus anynana has been shown to learn mate preference based on social interaction following emergence from the chrysalis, however if and how the social complexity of the larval experience affects this ability to learn is less understood. Here I test the effects of isolation during the larval period on a female’s ability …