What are the main characteristics of mammalia?
Some of the main characteristics of mammalia are: (A) These are found in all types of habitat, mostly terrestrial. (B) Varied shape body is present which is divisible into head ,neck ,trunk and tail. (C) They have sweat glands and the body skin is covered with hair. (D) They produce milk to Nourish their young ones. (E) Lungs are the only respiratory organ (F) Four-chambered heart is present.
