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  • Heart is completely 4 chambered in Option: 1 AvesOption: 2 Cr

Heart is completely 4 chambered in 

Option: 1

Aves


Option: 2

Crocodiles


Option: 3

Mammals


Option: 4

All of these


Answers (1)

best_answer

 

 

Class Aves - Characteristics Features -

  • Birds have streamlined bodies covered with feathers.
  • Their forelimbs are modified into wings.
  • The hind limbs are covered with scales and help in walking, swimming or clasping tree branches.
  • Skin is dry. There is no gland.
  • They have a bony endoskeleton. They have light and porous bones called pneumatic bones to assist flight.
  • They have a monocondylic skull.
  • They have a strong breast bone called keel to which the flight muscles are attached.
  • They have a four chambered heart.
  • They are warm blooded.
  • They are dioecious. Fertilization occurs internally. They are oviparous. 
  • The jaws are modified to form beak.
  • They lack urinary bladder.
  • They are uricotelic.
  • They consist of additional chambers, Crop and gizzard. Three chambered cloaca.

 

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 Birds, mammals and crocodile (only reptile) have four chambered heart.

Posted by

Ajit Kumar Dubey

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