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Now showing items 1821-1830 of 4247
Expression of HIF-1 Alpha and HIF-1 Beta in Insects Throughout Juvenile Development
(North Dakota State University, 2016)
Insects grow exponentially from hatching to adult. This growth is punctuated by periodic molts during which the exoskeleton, including the large airways of the respiratory system, is enlarged and replaced. Major tracheae ...
Student Interpretations of Phylogenetic Trees in an Introductory Biology Course
(North Dakota State University, 2013)
Phylogenetic trees are a common visual representation in biology, and the most important visual representation used in evolutionary biology. Thus, phylogenetic trees have also become an important component of biology ...
Online Student Resource Use and the Effect on Student Course Performance
(North Dakota State University, 2013)
The purpose of this study was to identify potential factors of student resource use that could indicate student success in an online course. This would allow instructors to look for in patterns of use to identify students ...
From Alcelaphus to Zapus: Conservation of Modern Mammalian Populations
(North Dakota State University, 2015)
Conservation priorities are increasingly important in the face of modern human activities.
Anthropogenic activities such as deforestation, pollution, and climate change have negative
impacts on all vertebrates. In chapter ...
Telomere Length and Senescence in a Long-lived Fish (Ictiobus cyprinellus)
(North Dakota State University, 2019)
The pattern of shorter telomere lengths in older individuals has been observed across many vertebrates, but has not been well-documented in bony fishes. Bony fish (i.e., Class Osteichthyes) represent the most speciose and ...
Testosterone (T) and Triiodothyronine (T3) in Franklin’s Gull (Leucophaeus Pipixcan) Eggs
(North Dakota State University, 2018)
Maternally-derived hormones are known to influence the growth and development of offspring. The differential deposition of these maternally-derived hormones into egg yolk is one way by which females can alter and impact ...
Peripheral Hormone Interactions with the Growth Hormone-Insulin-Like Growth Factor (GH-IGF) System in Rainbow Trout
(North Dakota State University, 2019)
The growth of vertebrates is primarily regulated by the growth hormone-insulin-like growth factor (GH-IGF) system, but not in isolation. The central question of this dissertation was how do other hormones peripheral to the ...
Eat to Reproduce: The Role of Diet Quantity on Honey Bee (Apis Mellifera) Caste Determination
(North Dakota State University, 2017)
The received wisdom is that diet quality drives this queen-worker dichotomy, even though diet quantity differs significantly between queen and worker diet. Diet quantity likely determines honey bee caste; yet it has never ...
Population Dynamics and Management Implications for American White Pelicans (Pelecanus Erythrorhynchos) Breeding at Marsh Lake, Lac Qui Parle Wildlife Management Area, Minnesota
(North Dakota State University, 2016)
The American white pelican (Pelecanus erythrorhynchos) is a prominent breeding bird in Minnesota, but little information has been available on their production, population dynamics, growth and development, or demographic ...
Optimizing Silk Protein Production Using an Engineering Approach
(North Dakota State University, 2020)
The acquisition of spider silk is a complex and costly process that restricts its availability. Increasing applications stemming from the biomedical and pharmaceutical sectors is driving the demand higher, necessitating ...