Assertion: echinoderm's structure | /r/HasProperty | vital
Facets:
value: in other groups
type: OTHER
value: to dissolution
type: TRANSITIVE-OBJECT
Source sentences:
text: These structures (known as pedicellarines) are small stinging structures that are not only used for defence and obtaining food, but are also vital in keeping the body of the sea urchin clean.
text: In other groups, structures made of calcium carbonate are vulnerable to dissolution when the pH is lowered.