5. Fill in the table Characteristics of the Classes of Sponges Chara

5. Fill in the table: Characteristics of the Classes of Sponges Characteristic Common name(s)
Spicule composition Type of canal system Habitat Representative genus Calcarea Hexactinellida
Demospongia


Solution


Characteristics of the classes of sponges.
Calcarea
Rhagon Type
Calcispongiae
Triaxonida or HyalospongiaeCharacteristics
CalcareaHexactinellidaDemospongiaCommon namecalcareous spongesGlass spongesPeople
spongesSpicule compositionCalcium carbonate in the form of calcite or aragoniteMade up of
fused spicules of silica.Made of spicules consisting of fibers of the protein spongin and mineral
silica.Type of canal sysytemSycon typeSycon type
Rhagon TypeHabitatFound in shallow tropical waters.Hexactinellida are predominantly solitary,
typically oceanic organisms, found in depths of more than 100 m, down to the hadal zone.Most
are marine dwellers, but one order (Spongillida) live in freshwater surroundings.Representative
Genus
Calcispongiae
Triaxonida or Hyalospongiae