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Full-Text Articles in Life Sciences
Historical Biogeography Of Lowland Species Of Toads (Bufo) Across The Trans-Mexican Neovolcanic Belt And The Isthmus Of Tehuantepec, Benson H. Morrill
Historical Biogeography Of Lowland Species Of Toads (Bufo) Across The Trans-Mexican Neovolcanic Belt And The Isthmus Of Tehuantepec, Benson H. Morrill
Undergraduate Honors Capstone Projects
The eastern extension of the massive Trans-Mexican Neovolcanic Belt 1 (TMNB) contacts the Atlantic Coast in central Veracruz, Mexico. Although it is not a massive structure at this eastern terminus, the TMNB has nonetheless effected vicariance and subsequent speciation in several species groups, including bufonid toads and freshwater fishes. In this study, we examined mtDNA sequences (cyt b, 16S) from populations of two different species groups of toads (B. marinus, and the B. nebulifer-B. valliceps species pair) from a lowland transect across the eastern end of the TMNB. We also included samples from outside this region (e.g., Costa …
Alkaloids And Old Lace: Pollen Toxins Exclude Generalist Pollinators From Death Camas, Melissa Weber
Alkaloids And Old Lace: Pollen Toxins Exclude Generalist Pollinators From Death Camas, Melissa Weber
Undergraduate Honors Capstone Projects
Many plants produce toxins to which specialist herbivores - typically insects - have evolved counter-adaptations, sometimes resulting in a co-evolutionary arms race. Although many non-social bee species are likewise taxonomic host specialists, the pollination guilds at their floral hosts frequently include diverse floral generalists as well, even on plants that are otherwise chemically defended. In this study, we show that pollen and nectar of foothills death camas (Toxicoscordion [=Zigadenus] paniculatum) contains zygacine, the alkaloid responsible for this plant's notorious mammalian toxicity. Many adults and larvae of the generalist solitary bee, Osmia lignaria (Megachilidae), were paralyzed and …
Magnesium Intake And Its Relationship With Type 2 Diabetes, Caralee Wilcock
Magnesium Intake And Its Relationship With Type 2 Diabetes, Caralee Wilcock
Undergraduate Honors Capstone Projects
Magnesium is an alkaline earth metal and is the second most abundant cation in the human body. Magnesium plays important roles in the structure and the function of the human body; it is involved in more than 300 essential metabolic reactions in the body. Magnesium has been implicated in the prevention and treatment of many diseases including diabetes. Magnesium depletion is commonly associated with both insulin dependent and non-insulin dependent diabetes. A significant number, (between 25% and 39%) of diabetics have been shown to have decreased serum levels of magnesium. There are many possible reasons and mechanisms for this. Diabetics …