Assertion: sea urchin's spine | /r/ObjectUse | used in defense
Facets:
value: most often
type: DEGREE
value: primarily
type: DEGREE
value: for burrowing in some forms
type: PURPOSE
Source sentences:
text: On their dorsal (top) side they have sharp, spike-like spines that are most often used in defense.
text: Habits: Adults bottom-dwelling marine animals; Sea Urchin Animal usually lie with mouth downward; move using tube feet, spines used for defense and for burrowing in some forms
text: The sea urchin’s spines can be used in locomotion, defense, and capture of prey.
text: The spines on their dorsal (top) side are sharp and spike-like and are most often used in defense.
text: Spines that are articulate with tuberceles (sockets) may be used in locomotion, defense, protection against sediment abrasion, excavating, feeding, and burrowing.
text: Spines are primarily used for locomotion and defense against predators, although some species cover them with shell fragments, algae, or encrusting organisms to camouflage themselves from visual predators or, alternatively, to provide shade from direct sunlight.
text: The spines of Strongylocentrotus droebachiensis are used for defense and locomotion and are not considered poisonous.