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  •  Completely developed four chambered heart is seen inOption: 1 Mammals<

 Completely developed four chambered heart is seen in

Option: 1

Mammals


Option: 2

Crocodiles


Option: 3

Both a and b


Option: 4

None of these


Answers (1)

best_answer

 

 

Class Mammalia - Characteristics Features -

  • These are the vertebrates that possess hair and mammary glands.
  • Mammals are endothermic.
  • They show the presence of external ear called pinna.
  • The development of teeth occurs in the jaw socket (thecodont); teeth can be classified as incisors, canines, molars and premolars (heterodont); the milk teeth are replaced by permanent teeth (diphyodont).
  • They have a four chambered heart with double circulation.
  • Respiratory, excretory, nervous and reproductive systems are highly developed.
     

- 

 

Both mammals and reptiles have a four chambered heart.

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Anam Khan

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