Assertion: mollusk's mantle | /r/CapableOf | cover whole upper surface
Facets:
Source sentences:
text: This has a single, "limpet-like" shell on top, which is made of proteins and chitin reinforced with calcium carbonate, and is secreted by a mantle covering the whole upper surface.
text: It is secreted by a mantle covering the whole upper surface.
text: Molluscs have limpet like shell on top which is made up of proteins and chitin fortified with calcium carbonate and secreted by mantle covering whole upper surface.