The amnios is a pouch in which an embryo develops and it is a defining characteristic of amniota.
It is a defining characteristic of amniota. The amnios is a pouch in which an embryo develops.
The amnios is a pouch in which an embryo develops. It is a defining characteristic of amniota.
The amnios is a pouch in which an embryo develops. It is a defining characteristic of amniota.