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They have hair, a skeleton, 4 limbs, circulatory system w/4 chambered heart, and are endothermic. ---- There are five basic features which characterise mammals: * they are vertebrates * they have fur, skin or hair * they are warm-blooded * they breathe through lungs (not gills) * they bear live young (with the exception of the two monotreme types, which lay eggs) and the young feed on mothers' milk
Wiki User
∙ 15y ago
Wiki User
∙ 10y agoMammals are vertebrates (internal) animals. They all have a backbone. Most mammals use either their legs or fins to get around. Mammals don't have feathers, but they do have either fur or hair on their skin, sometimes found in only small places on a certain mammal. Some mammals can have eggs and others can give live birth depending on the animal.
Features of Mammals are that they give birth to live young, they are warm blooded and they breathe oxygen. a major feature of a mammal- which gives it the name mammal- is the possession of the mammary gland. Only females have this gland, and it produces milk for their young. mammals have hair covering their body, whether fine or thick, and sometimes almost invisible, although whales and dolphins are an exception.
Wiki User
∙ 12y agoMammals have fur or hair
they have teeth
they are warm blooded
they are born alive
the only mammals that lay eggs are the platypus and spiky anteater
Wiki User
∙ 11y agoThe have a live birth and feed their young on milk
They are also warm-blooded (but so are the birds).
Wiki User
∙ 12y agoWell one of the features is they breathe air, They are born alive (Are carried in mothers womb) and Nurse their mother.
Wiki User
∙ 8y ago1.) Mammals are warm-blooded vertebrates2.) Mammals have a body covering of hair or fur.
3.) Mammals suckle their young.
4.) Mammals have specialized teeth.
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