A) Spicules
B) Spongin fibres
C) Tentacles
D) Holdfast
Correct Answer: B
Solution :
Masses of both sponges are collected and allowed to die and decay. Gradually the entire living part disintegrates while the skeleton made up of dense network of fibres composed of sulphur containing flexible collagen like protein (s-origin) is left. It is used for scrubbing the body at the time of bath, as well as few mopping and polishing floors, furniture, shoe etc.
You need to login to perform this action.
You will be redirected in
3 sec
