Question

Rasping organ with transverse teeth and present in the buccal cavity of a mollusc is called
A) Dental plate
B) Radula
C) Tongue
D) Rasper

Answer 1

The buccal cavity or oral cavity is the opening of the food canal that connects to the oesophagus from the pharynx. It consists of the teeth, tongue, and palate and is divided by the palate which acts as an entrance to the digestive system.

Complete answer:
In general, rasping indicates grating or scratching and other related phrases. Similarly, the Mollusca’s rasping organ is a versatile tongue-like organ with rows of teeth on the top, used to scratch or cut the acquired food.
The radula is a rasping organ-like file of transverse rows of chitinous teeth found in many molluscs' buccal cavities. It is used until it reaches the intestine, for scrapping or chopping food. It's like a ribbon that is similar to a tongue. The radula consists of several, equal rows of teeth, fine, flat or spiny outgrowths; there will also be a distinct morphology for each tooth in a row. It is possible to separate each tooth into three sections: a root, a shaft, and a cusp.
A dental plate is a type of denture that is used to cover teeth that are missing. The more lost teeth, the more you need a sort of dental plate so that you can chew correctly. Dentures are prosthetic instruments designed to replace damaged teeth, which are protected by the oral cavity's underlying soft and hard tissues.
The tongue in most vertebrates' mouths is a muscular organ that manipulates food for chewing and is used in the act of swallowing. In the digestive system, it is essential and the primary taste organ in the gustatory system.

Hence, the correct answer is option ‘B’, i.e, ‘Radula’.

Note: The second-largest phylum comprising a diverse variety of species is molluscs. A significant phylum of invertebrate species is molluscs (or molluscs). They're all marines. They have immense in-shore numbers, that is, in shallow water.