JAMB - Biology (2018 - No. 84)
A distinguishing feature of mammals is the possession of
Skin
Scale
Nail
Hair
Εξήγηση
The following features is exactly what makes a mammal a mammal, and not a reptile, a bird or a fish: Hair, Middle Ear Bones, Sweat Glands, Temperature, Regulation
It’s one of the features of mammals