Skeleton made of spongin fibers are characteristic of

Question

Skeleton made of spongin fibers are characteristic of (A) calcarea (B) hexactinellida (C) demospongiae (D) both (b) (c).

Tardigrade Admin · Accepted Answer

Skeleton of spongin fibres makes the internal endoskeleton. It may be made of calcareous spicules or siliceous structure.

Q. Skeleton made of spongin fibers are characteristic of