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Characteristics Of Mammals

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Answers to Common Questions
Six characteristics of mammals are: They have mammary glands, three middle ear bones, a diaphragm, a four-chambered heart, lower jaw made of a single bone and they have hair. Thanks!
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Mammal's are vertebra's meaning they have a back bone. They are the only animal that has true hair and they, with the exception of two, give birth to live young. They are also the only animals that produce milk to feed their young.
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THe characteristics of mammals are, 4 limbs mammary glands some type of hair or fur backbone/skeleton give birth to live young Sorry thats all I can think of, ill try to think of more.
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Answers to Other Common Questions
1. Have hair or fur 2. Give live birth 3. Have a backbone 4. Are warm-blooded 5. Have lungs and breathe air
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They run about Reproducing
http://wiki.answers.com/Q/What+are+a+mamal's+defenses
・ give birth ・ have hair/fur
http://wiki.answers.com/Q/What_are_some_mammal_characte...
All mammals have some hair or fur. They give birth to live young. Young are fed initially on their mothers milk. They breath air and are warmblooded They have four limbs.
http://wiki.answers.com/Q/Mammals+are+the+only+vertabra...
The four main characteristics of a mammal are; warm-blooded, nurse young, hair/fur, and live birth.
http://wiki.answers.com/Q/Four+characteristics+unique+t...
Monotremes and marsupials are mammals, so there's something wrong with your question. Monotreme mammals reproduce by egg-laying, marsupials do so by given birth to relatively poorly developed young which then, in most but not all cases, dev...
http://answers.yahoo.com/question/index?qid=20080504101...
Placental mammals have a placenta which provides nutrients to the young whilst developing in the uterus. Marsupials have a shorter gestation comparably, where the young are born relatively early and then provide nutrients to the young via m...
http://answers.yahoo.com/question/index?qid=20080609205...