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Which of the following is absent in frog?

Option: 1

External ear


Option: 2

Middle ear


Option: 3

Internal ear


Option: 4

None of these

 


Answers (1)

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Sense Organs in Frog -

  • Frog has different types of sense organs, namely organs of touch (sensory papillae, taste (taste buds), smell (nasal epithelium), vision (eyes) and hearing (tympanum with internal ears). 
  • Eyes and internal ears are well-organised structures and the rest are cellular aggregations around nerve endings.
  • Eyes in a frog are a pair of spherical structures situated in the orbit in the skull.
  • These are simple eyes (possessing only one unit). 
  • The external ear is absent in frogs and the only tympanum can be seen externally. 
  • The ear is an organ of hearing as well as balancing (equilibrium).
     

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Presence of external ear or pinna is a typical mammalian character. It is not seen in amphibians.

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shivangi.shekhar

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