Which one of the following characteristics is not shared by birds and mammals?

  • Option 1)

    Ossified endoskeleton

  • Option 2)

    Breathing using lungs

  • Option 3)

    Viviparity

  • Option 4)

    Warm blooded nature

 

Answers (1)

As learnt

Class Aves (Birds) -

Characterised by the presence of feathers and most of them can fly. They posses beak and forelimbs are modified into wings.

- wherein

Eg. Corvus, columba, Psittacula, Struthio, Pavo.

 

 AND

 

Class Mammalia -

Unique characteristic is presence of mammary glands. Two pairs of limbs and external ears or pinnae present.

-

 

 

Birds are oviparous while mammals are oviparous (prototherians) and viviparous (metatherians and eutherians).


Option 1)

Ossified endoskeleton

This option is incorrect

Option 2)

Breathing using lungs

This option is incorrect

Option 3)

Viviparity

This option is correct

Option 4)

Warm blooded nature

This option is incorrect

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