Do molecular mechanisms vary across species?

No Sex Required By Edyta Zielinska | November 19, 2012

An all-female species, distantly related to flatworms, steals all of genetic material it needs to diversify its genome.

Excerpt: “Although it’s unclear how the microscopic organisms acquire the foreign DNA, it appears that they adopt many of the functions encoded within.”

My comment: From Kohl (2012) : “Among different bacterial species existing in similar environments, DNA uptake (Palchevskiy & Finkel, 2009) appears to have epigenetically ‘fed’ interspecies methylation and speciation via conjugation (Fall et al., 2007; Finkel & Kolter, 2001; Friso & Choi, 2002). This indicates that reproduction began with an active nutrient uptake mechanism in heterospecifics and that the mechanism evolved to become symbiogenesis in the conspecifics of asexual organisms (Margulis, 1998).”

If, acquisition of foreign DNA is not a receptor-mediated event consistent with nutrient chemical uptake in other species (referenced above), how could asexual reproduction be controlled by the epigenetic effects of nutrient chemicals and pheromones. That control is required in all species (to avoid out-reproducing the nutrient chemical supply in the ecological niche required for social niche construction)?

Do the molecular mechanisms in rotifers vary from those known to be required for adaptive evolution of the neurogenic and socio-cognitive niches that enable organisms with neurons and a central nervous system to find food and and to distinguish it from their conspecifics. Clearly, conspecifics would probably not appreciate being ingested any more than heterospecifics appreciate being eaten to support the nutrient chemical needs of other species that metabolize the heterospecific DNA to pheromones that ensure survival of the fittest in species from microbes to man.  But that’s “Nature, red in tooth and claw.” — Lord Tennyson, even in microbial species with no teeth and no claws. Isn’t it?

What’s unclear about how the microscopic organisms acquire the foreign DNA? Did they find eating their heterospecifics to be distasteful? Other species express de novo receptors for chemicals that appear to determine whether or not they eat their neighbors. If rotifers don’t, is there a model for that?

 

 

About James V. Kohl 1307 Articles
James Vaughn Kohl was the first to accurately conceptualize human pheromones, and began presenting his findings to the scientific community in 1992. He continues to present to, and publish for, diverse scientific and lay audiences, while constantly monitoring the scientific presses for new information that is relevant to the development of his initial and ongoing conceptualization of human pheromones. Recently, Kohl integrated scientific evidence that pinpoints the evolved neurophysiological mechanism that links olfactory/pheromonal input to genes in hormone-secreting cells of tissue in a specific area of the brain that is primarily involved in the sensory integration of olfactory and visual input, and in the development of human sexual preferences. His award-winning 2007 article/book chapter on multisensory integration: The Mind’s Eyes: Human pheromones, neuroscience, and male sexual preferences followed an award winning 2001 publication: Human pheromones: integrating neuroendocrinology and ethology, which was coauthored by disinguished researchers from Vienna. Rarely do researchers win awards in multiple disciplines, but Kohl’s 2001 award was for neuroscience, and his 2007 “Reiss Theory” award was for social science. Kohl has worked as a medical laboratory scientist since 1974, and he has devoted more than twenty-five years to researching the relationship between the sense of smell and the development of human sexual preferences. Unlike many researchers who work with non-human subjects, medical laboratory scientists use the latest technology from many scientific disciplines to perform a variety of specialized diagnostic medical testing on people. James V. Kohl is certified with: * American Society for Clinical Pathology * American Medical Technologists James V. Kohl is a member of: * Society for Neuroscience * Society for Behavioral Neuroendocrinology * Association for Chemoreception Sciences * Society for the Scientific Study of Sexuality * International Society for Human Ethology * American Society for Clinical Laboratory Science * Mensa, the international high IQ society