Tag Archive: diversity

Imagining that data historically supports evolutionary theory

human-evolution

1) Arguments in the evo-devo debate: say it with flowers! Abstract excerpt: A key question in evolutionary developmental biology is how DNA sequence changes have directed the evolution of morphological diversity. The widely accepted view was that morphological changes resulted…
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Epigenetic pharmacology and RNA-mediated transciptional landscapes

terrarium eco system

Last year, Vosshall’s group eliminated ideas about the involvement of beneficial mutations in the nutrient-dependent cell type differentiation of mosquitoes. orco mutant mosquitoes lose strong preference for humans and are not repelled by volatile DEET. This year her group showed…
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More than a bag of chemicals?

neuronal-plasticity

From Fertilization to Adult Sexual Behavior (1996) Excerpt: “Small intranuclear proteins also participate in generating alternative splicing techniques of pre-mRNA and, by this mechanism, contribute to sexual differentiation in at least two species, Drosophila melanogaster and Caenorhabditis elegans…” My comment:…
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Stem cell memory is biophysically constrained (2)

translocated chromosome

If stem cell memory is biophysically constrained, by nutrient-dependent pheromone-controlled amino acid substitutions, we can expect to find experimental evidence that conserved molecular mechanisms link the basic principles of nucleosome retention in plants to nucleosome retention in mouse and human…
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Physics, Chemistry, and Molecular biology (PCMb)

human-evolution

Physics, Chemistry, and Molecular biology (PCMb) link ecological variation to ecological adaptations via a model of gene-cell-tissue-organ-organ system complexity that I first presented in 1992. After adding gene activation by pheromones, I co-authored a book that linked the pheromone-controlled physiology…
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RNA-mediated species diversification from microbes to primates

diseases-disorders

Mycobacteriophage-drived diversification of Mycobacterium abscessus Biology Direct (15 September 2014) OPEN ACCESS Excerpt (with my emphasis): “Widespread occurrence of phage sequences in almost all studied M. abscessus complex isolates suggests that the rate of prophage invasion is faster than the…
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The importance of science fiction to scientific fact

Concerned about the Eaton SF/F archive at UCR Complaint: “They have driven out long-serving and cherished members of its staff, have proposed policies that would result in the gutting of the Collection as a world-class archive…” My comment: “The concept…
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What Darwin proved: there’s no such thing as a species

GENETICS As Animals Mingle, a Baffling Genetic Barrier A short stretch of DNA is challenging what it means to be a species. By: Emily Singer August 5, 2014 Excerpt: “Scientists have dubbed such regions of the genome “islands of speciation.” The…
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Ecological adaptation: The third way

The Third Way The vast majority of people believe that there are only two alternative ways to explain the origins of biological diversity. One way is Creationism that depends upon supernatural intervention by a divine Creator. The other way is…
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Biological evolution: a direct contradiction

Biological evolution: Some genetic considerations It will probably not be long until at least one prominent evolutionary theorist acknowledges this fact, “The concept of biological evolution… stands in direct contradiction with our current knowledge regarding the behavior as well as…
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