Call Collect
Scotch, masking, electrical, you name it! This is what is used to lift patterns of trace evidence from a crime scene.
What is tape?
Of the three types of natural fibers, these are the most commonly found at crime scenes.
What are plant fibers?
(Half-credit given to cotton. No credit for going more specific than plant otherwise.)
This is the innermost layer of a hair.
What is the medulla?
Typically, a crime scene investigator will take approximately this many hairs from a victim or suspect, for comparison purposes.
What is 50?
If a person recently had a haircut, this is what the tip of their hair would look like.
What is linear?
OR what is a straight edge?
This is the standard method for collecting individual hairs one at a time from a person, using forceps aka. tweezers.
What is picking?
(Half-credit for the unofficial terms of plucking and tweezing)
These are the two most general classifications of fibers.
What are natural & manmade?
(Half-credit for just one of these. No credit for examples more specific than these.)
A cross-section of this writing implement is a good comparison to make to the cross-section of a hair.
What is a pencil?
This is the outermost layer of a hair.
What is the cuticle?
These are the two places DNA can be found in a hair.
(Follicle is not an option, as that this technically part of the skin.)
What is the root and the mitochondria?
(Partial credit allowed)
Clipping is a collection method that you can use to get a lot of hairs, but beware: This part of the hair that can be used to individualize the evidence will usually get left behind.
What is the hair root?
OR
What is the follicle?
Regenerated fibers usually had origins as plant fibers, and as such were made from this material found in plant cell walls.
What is cellulose?
This is the interior layer of the hair shaft where the pigments are contained.
What is the cortex?
The medullary index is the ratio between the diameter of the medulla to the diameter of this.
What is the hair shaft?
OR What is the cortex?
OR What is the entire hair?
Statistically, this approximate percentage of fibers can be lost from a crime scene within the first 24 hours.
What is 95%?
(Will accept an answer from 90% to 99.999999%)
Collecting dry evidence with a spatula (or even a small knife) is a collection method that goes by this name.
What is scraping?
These are the four types of plant fibers.
What are fibers from the seed, the fruit, the stem, and the leaf?
(Partial credit is allowed.)
If hair is natural, the cuticle is supposed to give this appearance.
What is transparent?
OR
What is colorless?
OR
What is clear?
This is what it means when the medullary index is greater than 0.5.
What is "the hair is not from a human?"
Rather than burn, synthetic fibers do this when exposed to extreme heat.
What is melt?
This is the least gentle & least careful way to collect trace evidence.
What is vacuum sweeping?
OR
What is vacuuming?
Animal fibers are made of these materials.
What are proteins?
This is the only part of hair that needs nutrients and oxygen.
What is the hair root?
Human hair has an M.I. of less than this number.
What is 0.33?
OR What is 1/3? OR What is one-third?
The longitudinal set of yarns in a weave pattern is known as this.
What is the warp?