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Question

Mandibles of cockroaches are:


A

Long and pointed

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B

Long and coiled

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C

Short with grinding teeth

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D

Short without teeth

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Solution

The correct option is C

Short with grinding teeth


The Correct option is C.

Explanation of the correct option:

  1. Mandibles are a pair of short structures/appendages present on either side of the mouth. They are triangular in shape and hard due to the presence of a chitin layer. These are unjointed structures regarded as jawbones or jaw or crushing organs. The function of mandibles is to grasp, crush, or cut the food. Also, mandibles provide defense against predators as they are hard due to chitin composition.
  2. Each mandible consists of two types of teeth. These teeth are grinding teeth showing incisor teeth type characteristics. They help in the mastication of food due to the grinding and incising function of mandibles.

Final Answer: Mandibles of cockroaches are short with grinding teeth.


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