Abstract Background Nutrition and predation have been considered two primary agents of selection important in the evolution of avian life history traits. The relative importance of these natural selective forces in the evolution of avian embryonic developmental period (EDP) remain poorly resolved. perhaps in part because research has tended to focus on a single. high taxonomic-level g... https://www.markymarkscott.com/product-category/ion-hair-esthe-brush-n-free-020/