Excerpt: “…were able to show that a single molecular pathway plays a role in both heritable changes in the flies’ number of ovarioles—egg-producing compartments in the ovaries—and in how they react to their environments by shutting down some ovarioles.”
Abstract excerpt: “This demonstrates that a plastic response conserved across animals can underlie the evolution of morphological diversity, underscoring the potential pervasiveness of plasticity as an evolutionary mechanism.”
My comment: This experimental evidence supports the claim that nutrient availability is the ecological variable that controls ecological adaptations via the metabolism of nutrients to species-specific pheromones. Effects of food “odors” and pheromones clearly link the epigenetic landscape to the physical landscape of DNA in the organized genomes of species from microbes to man via conserved molecular mechanisms. No unknown evolutionary mechanisms appear to be involved.
These biologists have zeroed in on the the role of plasticity in ecological adaptations. Their experimental evidence takes us even further away from ideas about evolution that only make sense to population geneticists and their minions. Their ideas about evolution have never made sense in the light of biology. That’s why experimental evidence continues to show that nothing about evolution makes sense in the light of molecular biology. In the light of molecular biology, ecological variation and conserved molecular mechanisms enable ecological adaptations.
In the light of molecular biology, nutrient-dependent pheromone-controlled ecological adaptations are manifested in morphological and behavioral phenotypes of species from microbes to man.
The species have not evolved. They have ecologically adapted. Species diversity exemplifies the plasticity that enables ecological adaptations. Species diversity does not exemplify evolution because the divergence of reproductive traits is nutrient-dependent and pheromone-controlled in all species. Natural selection has always been for nutrients and the metabolism of nutrients to species-specific pheromones has always enabled sexual selection in the context of the nutrient-dependent pheromone-controlled physiology of reproduction.