Pitt professor contends biological underpinnings
...of Arts and Sciences, is working to debunk a major tenet of Darwinian evolution. Schwartz believes that evolutionary changes occur suddenly as opposed to the Darwinian model of evolution, which is characterized by gradual and constant change. Among other scientific observations, gaps in the fossil record c...Education and guidelines needed for genetic testing in liver disease
...alpractice suits in the U.S. have been won on this tenet and, though rare, people have been turned away from employment because of their test results. The recent proliferation of inexpensive, commercial blood tests to identify disease-associated genes has made a powerful risk assessment tool accessible to ...Experimental evolution of yeast in the lab may illuminate early events in speciation
...derlie the emergence of new species. A fundamental tenet of Darwin's theory of evolution was that new species arise from older ones. Biologists typically define species on the basis of the ability of individuals to mate and produce fertile offspring; if two organisms can accomplish this feat, they belong t...Scientific societies support teaching evolution
...eve there is no such controversy. The fundamental tenet of evolution - descent with modification - is accepted by the vast majority of biologists. The current debates within the research community deal with the patterns and processes of evolution, not whether the evolutionary principles presented by Darwi...Key process in gene regulation occurs in blood platelets, Univeristy of Utah researchers find
... CITY -- In a discovery that upends a longstanding tenet of human biology, University of Utah School of Medicine researchers have shown that a key process in gene regulation can occur in human platelets, unique cells that are unusual because they don't have a nucleus (anucleate). Scientists long have thou...Certain fish have a special mating preference
... "All females had the same preference." A tenet of Langerhans's study was his belief that the gonopodium could be viewed as a secondary sexual trait similar to a peacock's tail, meant to enhance reproductive opportunity and selected by the female rather than a primary sexual trait which is the ...Same-sex mating discovered in a toxic fungus
...tious fungus has been found to defy the most basic tenet of sexual reproduction that successful mating requires individuals of the opposite sex, according to Howard Hughes Medical Institute researchers at Duke University Medical Center. In the April 21, 2005, issue of Nature, the researchers reported that......testing another long-standing but poorly supported tenet of Down syndrome research by using the mouse models to study the involvement of neural crest cells, precursors to structures affected in Down syndrome, including the face, heart and the nerves that serve the intestines....