Question

Glass rope sponge is
A) Hyalonema
B) Euplectella
C) Scypha
D) Spongilla

Answer 1

Hint: Glass rope sponge is the unique species of sponge which is found in deep oceans. They belong to phylum Porifera. Their tissues contain glass-like structures made up of silica.

Complete Answer:
The sponges which have siliceous spicules are known as glass sponges. The sponges belong to the phylum Porifera.
The glass sponges are cup shaped animals which are only found in the Deep Ocean. The height of this organism ranges from 10-30 cm. They have multinucleate cytoplasm. They have a symmetrical body with the presence of a large cavity. The internal skeleton is sturdy lattice- like made up of silica. The glass sponges have the tendency to fuse together. They create reefs or bioherms. Example Hyalonema which is popularly called glass rope sponge.
Euplectella- It is the genus of glass sponges which is commonly known as venus basket. It is basket like or vase shaped.
Scypha- It is a marine sponge which belongs to class Calcarea. It is also known as sycon. The shape of the body is finger like.
Spongilla It is a freshwater sponge of the family Spongillidae. They are found attached to rock, sticks or plants.

The correct answer is (A). Glass rope sponge is Hyalonema.

Note:The glass rope sponges do not have any organ system or tissues. These sponges serve as shelter for invertebrates and fish. They can reproduce sexually and asexually. They have an elegant look that is why they are used as a popular wedding gift in Japan.