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  •  In amphibians  a) Eyes are present but eyelids are absent  b) Tympanum is present but Pinna is a

 In amphibians 

a) Eyes are present but eyelids are absent 

b) Tympanum is present but Pinna is absent 

c) Eyes and eyelids are present 

d) Tympanum is absent 

Choose the correct option:

Option: 1

a and c


Option: 2

b and c


Option: 3

c and d


Option: 4

a and b


Answers (1)

best_answer

 

 

 

 

Class Amphibia - Characteristics Features -

  • The animals belonging to this class live in water as larvae and on land as adults. They need water to complete their life cycles.
  • They have a characteristic smooth and moist skin with many glands.
  • Scales are absent from their body.
  • Their body is divided into head and trunk. There is no neck.
  • Out of two pairs of limbs, the forelimbs are smaller than hind limbs. The hindlimbs are muscular and help in jumping. They have webbed-feet that allow swimming.
  • Their eyes are covered with movable lids called nictitating membrane.
  • Tympanum is the hearing organ. There is no external ear.
  • The respiratory organs include gills, lungs and skin.
  • They are cold blooded.
  • They have a three chambered heart. 

They have separate sexes. Fertilization occurs externally in water. Development is indirect and involves metamorphosis.

 

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Amphibia have tympanum, eyes and eyelids.

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