Assertion: sea urchin's sex | /r/HasProperty | separate male and female
Facets:
Source sentences:
text: Sea urchins are dioecious, having separate male and female sexes, although no distinguishing features are visible externally.
text: Sea urchins are dioecious, having separate male and female sexes, although no distinguishing features are visible externally.
text: Sea urchins are dioecious, having separate male and female sexes, although distinguishing the two is not easy, except for their locations on the sea bottom.