Question

Sponge used in scrubbing and polishing is
A. Spongilla
B. Euspongia
C. Hyalonema
D. Cliona

Answer 1

Hint: A sponge is a cleaning tool made of soft and porous materials. Sponges are commonly used for cleaning water-resistant surfaces and are excellent at absorbing water and water-based solutions. Originally made from natural marine sponges, nowadays they are mostly made from synthetic materials.

Complete answer: Some sea sponges like Euspongia are used for bathing, washing, cleaning, polishing, scrubbing, making ceramics, etc. Euspongia is commonly found in shallow water stuck to the ground. The skeleton consists of spongy fibres. Silicone splinters are absent. Usually, it has a spherical shape with numerous oscula mounted on well-marked protrusions channels. Its dried skeleton is commonly used as a bath sponge.
i. Spongilla is a freshwater fungus that most commonly grows on submerged plants and branches. It is used as a component of homoeopathic medicines in dry form to treat thyroid, heart disease, insomnia and others.
ii. Hyalonema is a glass rope sponge found only in the sea. It belongs to the phylum Porifera and the order Amphidiscophora. It has a rounded or oval body with a spirally twisted root tuft.
iii. Cliona is known as a boring sponge. This destroys oyster production by damaging the shells.
Thus, the correct answer is option B.

Note: Sea Sponges do not move, but filter a lot of water for food (plankton) and oxygen. Sea Sponges are one of the simplest multicellular organisms. There are approximately 5,000 species of marine sponges in the world. Sponges do not have a head, eyes, brain, arms, legs, ears, muscles, nerves or organs.