In some mammals, which include hedgehogs and porcupines, the hairs are already modified into difficult spines or quills. These are protected with thick plates of keratin and serve as defense towards predators. [fifty two] Part of the evolution was the event of endurance working[fifty three] and venturing out through the https://remingtonksxdi.idblogmaker.com/35315060/5-easy-facts-about-hair-salon-in-ottawa-described