Assertion: early sponge | /r/HasProperty | had biomineralized sponge spicules
Facets:
value: weakly
type: MANNER
Source sentences:
text: This uncertainty, however, does not affect the main conclusion that early sponges may have had weakly biomineralized sponge spicules, which is inferred from the presence of a significant amount of organic matter in many Paleozoic spicules and juvenile spicules of extant sponges37.