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Mandibles are reduced and functionless i...

Mandibles are reduced and functionless in

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Assertion:Vestigial organs are greatly reduced and functionless Reason:These organs were fully developed and functional in the ancestral forms, but are gradually disappearing due to change in the mode of life of their descendants .

What is the name of the structures which help the mandibles and function as accessory jaws ?

Mandibles of cockroach are :

Mandibles of cockroach are :

Mandibles of cockroach are :

Mandibles of cockroach are :

Mandibles are present in the mouth parts of

Assertion. The antisense (missence) chain of DNA is not transcribed and is, thus, functionless. Reason. The two DNA chains are firmly held together so that they never separate (denature).

Assertion: Cockroach has biting and chewing type mouth parts. Reason: Mandibles have teeth to cut and chew the food in cockroach.