Question

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

(a) Viviparity

(b) Warm blooded nature

(c) Ossified endoskeleton

(d) Breathing using lungs

Answer 1

Ans: (a) Viviparity

Sol: All birds are oviparous while all mammals except Ornithorhyncus (duck billed platypus) and Echidna or Tachyglossus (spiny anteater) are viviparous.