In mammals,what has developed as the external | vedclass

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(A) In mammals,the external ear is represented by the pinna (auricle). $1$. The pinna is a cartilaginous structure that helps in collecting sound wave

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Pinna

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(A) In mammals,the external ear is represented by the pinna (auricle). $1$. The pinna is a cartilaginous structure that helps in collecting sound waves from the environment. $2$. Ear ossicles ($Malleus$,$Incus$,$Stapes$) are part of the middle ear. $3$. The tympanic membrane (eardrum) separates the external ear from the middle ear. $4$. The auditory meatus is the canal leading to the eardrum. Therefore,the correct answer is $A$.

In mammals,what has developed as the external ear?

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