Assertion: nervous system | /r/HasAspect | common structure
Facets:
value: in bilaterian animals
type: LOCATION
Source sentences:
text: In bilaterian animals, which make up the great majority of existing species, the nervous system has a common structure that originated early in the Ediacaran period, over 550 million years ago.
text: In bilaterian animals, which make up the great majority of existing species, the nervous system has a common structure that originated early in the Cambrian period, over 500 million years ago.