During a Microscopic Comparison of Two Hairs, a Trace Analyst

question 59

Essay

During a microscopic comparison of two hairs, a trace analyst compares the medullae of the hairs to determine species of origin and, if possible, human origin of the hairs. What is the difference between the medullae of human and animal hairs? Name one exception to this among humans that may help in these determinations.

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Definitions:

Insomnia

A sleep disorder characterized by difficulty falling asleep, staying asleep, or obtaining restorative sleep, leading to impairments in daytime functioning.

Dependent Variable

The variable in an experiment that is expected to change or respond as a result of manipulations of the independent variable.

Manipulates

To control or influence a person, situation, or system cleverly, unfairly, or unscrupulously, often to gain an advantage.

Independent Variable

In an experiment, the variable that is manipulated to observe its effect on a dependent variable.