Final answer:
The hair cuticle can be used to identify different animal species based on its structure and characteristics. It acts as a protective barrier for the underlying layers of the hair and varies in shape, size, and pattern among different species. By examining the cuticle under a microscope, experts can compare and analyze hair samples to determine the species they belong to.
Step-by-step explanation:
The hair cuticle can be used to identify different animal species based on its structure and characteristics. The hair cuticle is the outermost layer of the hair shaft, and it acts as a protective barrier for the underlying layers of the hair. It is composed of overlapping scales that vary in shape, size, and pattern among different species.
For example, in humans, the hair cuticle is usually smooth and flat, while in other animals such as dogs or cats, it can have a more irregular or scalloped appearance. In addition, the thickness and structure of the hair cuticle can also differ between species. By examining these characteristics under a microscope, experts can compare and analyze hair samples to determine the species they belong to.