Mammals are the only ones that can have fur or hair over their skin.
Birds have feathers.
Amphibians have moist skin.
Reptiles have scaly skin.
Fish have scales.
The most obvious way in which mammals differ from the other four classes of vertebrates is that mammals nurture their young on mothers' milk.
mammals have hair all over their bodies, they give birth to live young, they include the largest animal ever-the blue whale
Mammals, a branch of vertebrates, possess hair and mammary glands. No other vertebrates do.
Vertebrates have backbones, other animals (besides vertebrates) don't have back bones.
Elks are vertebrates. An invertebrate has no backbone like a snail.
they are warm blooded
The most body covering of a bird is the beak.
Snakes eyes differ from eyes of mammals or other vertebrates. Other vertebrates are able to focus a sharp image on he retina of their eyes, by using a special muscle to change the shape of the lens. In many snakes though these muscles are absent, therefore a snake cannot focus on a stationary object. They are however very sensitive to movement. Some snakes have excellent eye sight but they are very uncommon.
Yes. All mammals, including marsupials, have the following characteristics:a body covering of fur, skin or hairsuckle the young on mothers' milkwarm-blooded vertebrates which breathe through lungswith the exception of platypuses and echidnas which are monotremes, or egg laying mammals, all other mammals including marsupials give birth to live young
Hair and milk.
Bird and mammals are the only two groups of vertebrates which are warm blooded. Amphibians, reptiles and fish, the other vertebrate groups, are all cold-blooded.
vertebrates differ from other animals because they have a central nervous system running down their back