View Do All Mammals Have Hair Background. Each hair is made from keratin. Presence of hair is mammalian character.humans are mammals and we have hair.
When it comes to being mammal, dolphins fit the bill in all respects.
The eight main mammal characteristics start with mammary glands, hair all mammals have hair growing from some parts of their bodies during at least some stage of their life cycle. Each hair is connected to a tiny muscle at its base, which can pull on the hair to make it stand on end. In fact, when dolphins are born, you can actually find a few stray hairs poking out of their chin. The other extant (living) classes of vertebrates (animals with backbones) include fish (with a few recognized classes).
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