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What make mammals different from all other vertebrates?

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Hair and milk.
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How are mammals different from other vertebrate animals?

The presence of a backbone (a "vertebrae") does not DEFINE a mammal because other animals also have backbones, eg reptiles, birds and fish - these animals are also "vertebrate

What characteristics do mammals have that are different from other vertebrates?

Mammals, along with birds, are warm-blooded. Along with reptiles and birds, they are amniotes. Mammals are unique among vertebrates in that they have hair somewhere on their b

How do mammal kidneys differ from the kidneys of other vertebrates?

Only mammalian kidneys have a renal pelvis (dilated beginning of the ureter) and renal pyramids (8 to 18 cone-shaped tissues in the renal medulla). The renal medulla (the inne