Monday, November 4, 2013

Why is some hair curly and some hair straight ?

                            Why is some hair curly and some hair straight ?

Hair is curly or straight , depending upon the bonds between the hair protein .
The greater the number of links, the curlier the hair and the fewer the bonds, the straighter the hair. 
People can temporarily alter their hair to force it into a straight state or curly state. But it is only temporary not permanent.