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Question

A rasping organ with transverse teeth and present in the buccal cavity of molluscs is called


A

Dental plate

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B

Radula

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C

Tongue

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D

Rasper

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Solution

The correct option is B

Radula


The correct option is B

Explanation of the correct option:

  1. The radula is a file-like rasping organ i.e. transverse rows of chitinous teeth found in buccal cavities of molluscs.
  2. Until it reaches the intestine, it is used for scraping or chopping food.
  3. It is similar to the tongue.
  4. The radula has equal rows of teeth, fine, flat, or spiny outgrowths with distinct morphology for each tooth in a row.
  5. It has three sections: a root, a shaft, and a cusp.

Explanation of the incorrect option:

Option A:

  1. A dental plate is said to be a type of denture which is used to cover teeth that are missing.
  2. Dentures are the prosthetic instruments used to replace damaged teeth protected by the oral cavity's underlying soft and hard tissues.

Option C:

  1. The tongue is found in most vertebrates' mouths and is a muscular organ that helps in chewing and is used in swallowing.
  2. In the digestive system, it is essential and the primary taste organ in the gustatory system.

Option D:

A rasping organ with a transverse row of teeth present in the buccal cavity of a Mollusca is called radula and the organism is known as rasper.


Final answer: A rasping organ with transverse teeth present in the buccal cavity of a molluscs is called radula.


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