What is the difference in class aves and class mammalia?

Answer 1

Following are the differences between Aves and Mammalia : 1) Aves are oviparous, i.e., lay eggs while Mammalia (most of them ) are viviparous i.e., lay young babies . 2) Aves do not have mammary glands while Mammalia have mammary gland for production of milk. 3) Body of Aves are covered with feathers while body of Mammalia are covered with hairs. 4) Aves do not have any teeth while Mammalia have teeth.

Answer 2

Class Aves includes birds, which are warm-blooded vertebrates with feathers, beaks, and wings, while Class Mammalia includes mammals, which are warm-blooded vertebrates that typically give birth to live young and nurse them with milk produced by mammary glands. Birds lay eggs, have lightweight skeletons, and lack teeth, while mammals have hair or fur covering their bodies and typically have differentiated teeth.