Which one of the following characteristics is not shared by birds and mammals?
Ossified endoskeleton
Breathing using lungs
Viviparity
Warm blooded nature
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