| 11. | They are small pterygoid teeth, and no external ears.
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| 12. | Pinnae ( external ears ) are also a distinctive trait that is a therian exclusivity.
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| 13. | Elastic cartilage is found in the external ear flaps and in parts of the larynx.
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| 14. | They lack external ears and have sleek, streamlined bodies.
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| 15. | It has an adequate built-in speaker, and comes with an external ear-bud speaker and microphone.
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| 16. | They have small external ears and an elongated snout.
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| 17. | The external ear ( pinnae ) is fairly large and broad in a mouse-like fashion.
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| 18. | Artificial external ear, skin fashioned over plastic mold, to repair congenital defect or accident damage.
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| 19. | Via the Eustachian tube, material from the external ear can enter the mouth and be tasted.
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| 20. | It has no external ears or tail and the vestigial eyes are covered by hairy skin.
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