Question

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

• A. Ossified endoskeleton
• B. Breathing using lungs
• C. Viviparity
• D. Warm blooded nature

Answer 1

The correct option is C Viviparity

Viviparity is a reproductive pattern in which females retain developing eggs inside their reproductive tracts or body cavity and give birth to offspring capable of a free-living existence.
Oviparity, in contrast, is a pattern in which females deposit eggs that develop and hatch in the external environment.
Mammals are viviparous, while birds are oviparous.