Middle ear and tympanum are absent in

Anura

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Apoda

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Urodela

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Both B and C

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Solution

The correct option is D Both B and C
Middle ear and tympanum are absent in
$\Rightarrow$ Both order Apoda and urodela.
characteristics of Apoda.
$∙$ Dimbless
$∙$ Scales present
Eg:- Ichtloryophis
Characteristics of Urodela.
Tail present
Eg: Siren, Salamandra.

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Amplification and transmission of the vibrations received by tympanum into the inner ear are done by:

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