Assertion: sponge's skeleton | /r/HasProperty | absent
Facets:
value: in anemone
type: LOCATION
value: occasionally
type: DEGREE
Source sentences:
text: Occasionally the skeleton is absent, a feature shared again with some Homoscleromorpha.
text: ✦ Since skeleton is absent in anemone, the contractile cells pull against the gastrovascular cavity, which acts as a hydrostatic skeleton.