Which of the following groups of animals is c | vedclass

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(D) The presence of a $pinna$ (external ear) is a unique and diagnostic characteristic of the class $Mammalia$.Other classes like $Reptilia$, $Aves$ (

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Mammals

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(D) The presence of a $pinna$ (external ear) is a unique and diagnostic characteristic of the class $Mammalia$.Other classes like $Reptilia$, $Aves$ (birds), and $Amphibia$ do not possess an external ear flap or $pinna$ to collect sound waves.Therefore, the correct option is $D$.

Which of the following groups of animals is characterized by the development of the pinna (external ear)?

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