In a few mammals, like hedgehogs and porcupines, the hairs are actually modified into hard spines or quills. These are definitely lined with thick plates of keratin and serve as defense towards predators. [fifty two] Part of this evolution was the event of endurance working[fifty three] and venturing out throughout https://hairsaloninottawa20975.elbloglibre.com/36302506/the-single-best-strategy-to-use-for-hair-salon-in-ottawa