Question

Pinna is a part of external ear and it is found in mammals .Do aves and reptiles show external ear in any form ? ​

Answer 1

yes all the mammals have the ear pinna in different forms

Answer 2

Answer: no

Explanation: Because if they had any external structure like pinna then water could had been gone inside and that would not be good for them as they dont have any waxy layer inside their body for protection from water