Question

Explain characteristic features of mammalia with examples in detail.

Answer 1

Characteristic features of class: Mammal:
Mammals are warm-blooded animals. The skin is covered with hairs. It also bears sweat and sebaceous (oil) glands.

• The body is divisible into head, neck, trunk and tail. Females have mammary glands, which secrete milk for feeding the young ones.
• The external ears or pinnae is present. Heart is four chambered and they breathe through lungs.
• Except egg laying mammals (Platypus, and Spiny anteater), all other mammals give birth to their young ones (viviparous).
• Placenta is the unique characteristic feature of mammals.

Example: Rat, Rabbit, Man