Browsing Biology by Title
Now showing items 60-79 of 1310
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Adaptation in a Changing World: Evolutionary mechanisms of salt tolerance in a coastal amphibian
(East Carolina University, 2018-07-20)In order to predict evolutionary outcomes of environmental change on populations in nature, we need an improved understanding of the biological mechanisms that affect whether organisms will adapt to a changed environment. ... -
Adaptive evolution of genes underlying schizophrenia
(East Carolina University, 2007-11-22)Schizophrenia poses an evolutionary-genetic paradox because it exhibits strongly negative fitness effects and high heritability, yet it persists at a prevalence of approximately 1% across all human cultures. Recent theory ... -
Adaptive responses to salinity stress across multiple life stages in anuran amphibians
(2017-08-01)Background In many regions, freshwater wetlands are increasing in salinity at rates exceeding historic levels. Some freshwater organisms, like amphibians, may be able to adapt and persist in salt-contaminated wetlands by ... -
Algal genes in aplastidic eukaryotes are not necessarily derived from historical plastids
(2012-07)In photosynthetic eukaryotes, many genes were transferred from plastids or algal endosymbionts to nuclear genomes of host cells. These transferred genes are often considered genetic footprints of plastids. However, genes ... -
Alkaloid defenses of co-mimics in a putative Müllerian mimetic radiation
(2014)Background Polytypism in aposematic species is unlikely according to theory, but commonly seen in nature. Ranitomeya imitator is a poison frog species exhibiting polytypic mimicry of three congeneric model species (R. ... -
Alteration of In Vivo Cellulose Ribbon Assembly by Carboxymethylcellulose and Other Polysaccharides
(East Carolina University, 1982)In vivo cellulose ribbon assembly by the Gram-negative bacterium Acetobacter xylinum can be altered by incubation in carboxymethylcellulose (CMC), a negatively charged water-soluble cellulose derivative, and also by ... -
Amazonian Amphibian Diversity Is Primarily Derived from Late Miocene Andean Lineages
(East Carolina University, 2009-03)The Neotropics contains half of remaining rainforests and Earth’s largest reservoir of amphibian biodiversity. However, determinants of Neotropical biodiversity (i.e., vicariance, dispersals, extinctions, and radiations) ...