Skeleton of sponges is made up of ………. And ……….

Nylon is made up of

Sponge is a

Skeleton in sponges includes

Skeleton in sponges includes

Assertion : The skeleton of sponges is made up of spicules. Reason : Composition of spicules help in classification of sponges.

Cytoskeleton is made up of

Cytoskeleton is made up of

What is the skeleton of sponges made up of ?