Question

Describe key features of class Mammalia. Discuss how these features enable them to be at the top of the

evolutionary pyramid.​

Answer 1

The general structure of the mammalian characteristic are:

Mammals are endothermic vertebrates.

Have hair and fur on the body.

Have mammary glands.

Four chambered hearts.

Have sebaceous (fat secreting glands), sudoriferus (sweat), and scent glands.

Have heterodont dentation (different types of teeth)

Posses diaphragm.

The three characteristics are mammary glands, hair and three middle ear bones. Other characteristics often thought to be unique to mammals are found in other species including birds, insects and reptiles.