Assertion: carbonate's form | /r/ObjectUse | used as protective coating
Facets:
value: for many planktonic species
type: TRANSITIVE-OBJECT
Source sentences:
text: Carbon is also biologically fixed in the form of calcium carbonate (CaCO 3 ) used as a protective coating for many planktonic species (coccolithophores, foraminifera) as well as larger marine organisms (mollusk shells).