Q. Spicules made up of silica are found in

 1363  230 VMMC MedicalVMMC Medical 2014 Report Error

Solution:

In Hyalonema siliceous, spicules are found. Hyalonema is a member of class-Hexactinellida of phylum Porifera. The main characterstic feature of class; Hexactinellida is the presence of siliceous spicules.