A model of biological evolution is considered based on Lotke-Volterra population models (ecological interaction) with mutation being modeled by introducing new species with random ecological connections. It is found that the system evolves away from the ecological equilibrium point to a sort of steady-state balancing extinction with speciation.

Embryology, which is a part of anatomy curriculum, well known to be most difficult teach. Applied embryology important in medical practice especially obstetrics and gynecology. To support teaching embryology, few multimedia methods have been introduced for the past twenty years, such as animations, two-dimensional illustrations, three-dimensional movies, video. Innovative learning technology, p...

introduction: quantitative and qualitative enhancement of educational activities is an essential issue. learners’ cooperation in the teaching process in order to increase teaching effectiveness and promotion is considered significant. the aim of the present study was to determine the effect of establishment of student working group on the teaching general embryology course to medical students. ...

Geliş tarihi: 18.02.2010 Kabul tarihi: 02.06.2010 The article was presented of 4th Asian-Pasific International Congress of Anatomists, 7-10 September 2005, Kuşadası-Turkey Department of Histology and Embryology, Dicle University Faculty of Medicine, Asistant Professor*; Department of Histology and Embryology, Professor**; Department of Ophtalmology, Associate Professor***; Department of Histolo...

Embryological research at the University of Wroclaw covers hormonal control of metamorphosis, primarily invertebrate embryology and gametogenesis, vertebrate myogenesis and the developmental impact of external factors. Developmental studies at the University of Wroclaw are a continuation of those conducted at the former Jan Kazimierz (Johannes Casimirus) University in Lwow before World War II. ...

introduction: in chick embryo, endodermal component of the liver becomes split into 2 diverticula in a short time. the anterior diverticulum lies to the left of the ductus venosus and the posterior one to its right side. as the liver primordium grows, it is invaded by the embryonic veins. based on the different incubation time periods and evolutionary origin of avian species, various times for ...