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

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.

What is the skeleton of sponges made up of ?

The outer skeleton of snail is made up of .......... .