Assertion: sea urchin's spine | /r/ObjectUse | used for protection
Facets:
value: for trapping drifting algae
type: PURPOSE
value: against feeding
type: PURPOSE
value: against burrowing
type: TRANSITIVE-OBJECT
value: against sediment abrasion
type: PURPOSE
value: against excavating
type: TRANSITIVE-OBJECT
Source sentences:
text: The spines are used for protection, for moving,and for trapping drifting algae to eat.
text: Spines that are articulate with tuberceles (sockets) may be used in locomotion, defense, protection against sediment abrasion, excavating, feeding, and burrowing.
text: These organisms posses spines that are used for both protection and locomotion.
text: The spines are used for protection, for moving,and for trapping drifting algae to eat.
text: Long, sharp spines are used for protection, and in some species are poisonous.