biophysical contraint

Tweaking the story to fit the theory

Tweaking the beak: Retracing the bird’s beak to its dinosaur origins, in the laboratory Reported May 12, 2015 They linked a crucial part of the avian feeding apparatus to the nutrient-dependent pheromone-controlled physiology of reproduction that enables fixation of RNA-mediated amino acid substitutions in the organized genomes of species from microbes to man, and placed Tweaking the story to fit the theory