To distinguish between human and animal hair, forensic scientists may look at what part of the hair? a. medulla b. nucleus c. root d. color,

The answer is a. Medulla. The human and animal hair are composed of the three basic elements of hair: medulla, cortex, and cuticle. Human and animal hair have differences in the medullary index. In animals, the medulla is much larger that it is in humans.The ratio of the diameter of the medulla to the diameter of the entire hair is called as the medullary index. If the medullary index is 0.5 or greater, the hair came from an animal. If the medullary index is 0.33 or less, the hair is from a human.