Abstract The origin of tetrapods is a c…

Abstract
 
The origin of tetrapods is a complex question that webs together genetic, paleontological, developmental and physical facts. 
A very interesting question of evolutionary biology indeed, mobilizing the efforts of many.
 
Basically, the development of embryos is described by a complex mix of mechanical movements and biochemical inductions of genetic origin. 
It is difficult to sort out in this [...]