South Dakota Cosmetology Practice Exam

The cuticle is the outermost layer of hair and provides protection for the inner layers. It is made up of overlapping scales, similar to the shingles on a roof. The average person's hair has 7-14 layers in the cuticle, making option B the correct answer. Option A is incorrect because it is too low of a range and would not provide enough protection for the hair. Option C is incorrect because it is too high of a range and would be unnecessary for the hair. Finally, option D is incorrect because it is an even higher range, which would not be found in most people's hair.