Exam 11: Hairs and Fibers

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The scale pattern of the cortex is an important feature for characterizing animal hair.

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Pigment granules that impart hair with color are found in the:

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It is not possible to link a fiber strand definitively to a single garment.

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The stages of hair growth include all of the following EXCEPT:

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Which of the following is NOT an example of a natural polymer?

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Which of the following questions CANNOT be answered with a microscopic examination of hair?

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Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Fibers derived from either natural or synthetic polymers B)A transition stage between the anagen and telogen phases of hair growth C)Two or more atoms held together by chemical bonds D)A cellular column running through the center of the hair E)DNA that is present in the nucleus of a cell and that is inherited from both parents F)The scale structure covering the exterior of the hair G)The final growth phase in which hair naturally falls out of the skin H)DNA present in small structures outside the nucleus of a cell.. This form of DNA is inherited maternally (from the mother). I)A substance composed of a large number of atoms that are usually arranged in repeating units J)The main body of the hair shaft K)Fibers derived entirely from animal or plant sources L)The basic unit of structure from which a polymer is constructed M)A molecule with a high molecular mass N)The initial growth phase during which the hair follicle actively produces hair O)A translucent piece of tissue surrounding the hair's shaft near the root that contains the richest source of DNA associated with hair -Catagen phase

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A criminalist first compares the color and ________ of fiber evidence.

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Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Fibers derived from either natural or synthetic polymers B)A transition stage between the anagen and telogen phases of hair growth C)Two or more atoms held together by chemical bonds D)A cellular column running through the center of the hair E)DNA that is present in the nucleus of a cell and that is inherited from both parents F)The scale structure covering the exterior of the hair G)The final growth phase in which hair naturally falls out of the skin H)DNA present in small structures outside the nucleus of a cell.. This form of DNA is inherited maternally (from the mother). I)A substance composed of a large number of atoms that are usually arranged in repeating units J)The main body of the hair shaft K)Fibers derived entirely from animal or plant sources L)The basic unit of structure from which a polymer is constructed M)A molecule with a high molecular mass N)The initial growth phase during which the hair follicle actively produces hair O)A translucent piece of tissue surrounding the hair's shaft near the root that contains the richest source of DNA associated with hair -Anagen phase

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The number of hair scales pointing towards the tip of the hair is ________ the number of hair scales pointing towards the hair follicle.

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A human hair in cross-section appeared flat in shape. The racial origin was most likely:

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Human head hairs rarely show continuous ________.

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The presence of sheath cells on hair that has been pulled quickly from the head is ________ the presence of sheath cells on hairs that have been removed slowly from the scalp.

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What two features make hair a good subject for establishing individual identity? To which layer of the hair shaft are much of these features attributed?

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Members of the Negroid race usually have head hairs with continuous medullae.

(True/False)
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Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Fibers derived from either natural or synthetic polymers B)A transition stage between the anagen and telogen phases of hair growth C)Two or more atoms held together by chemical bonds D)A cellular column running through the center of the hair E)DNA that is present in the nucleus of a cell and that is inherited from both parents F)The scale structure covering the exterior of the hair G)The final growth phase in which hair naturally falls out of the skin H)DNA present in small structures outside the nucleus of a cell.. This form of DNA is inherited maternally (from the mother). I)A substance composed of a large number of atoms that are usually arranged in repeating units J)The main body of the hair shaft K)Fibers derived entirely from animal or plant sources L)The basic unit of structure from which a polymer is constructed M)A molecule with a high molecular mass N)The initial growth phase during which the hair follicle actively produces hair O)A translucent piece of tissue surrounding the hair's shaft near the root that contains the richest source of DNA associated with hair -Molecule

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A regenerated fiber can be derived from:

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Which part of the hair shaft is most resistant to chemical decomposition?

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The scale pattern is not a useful characteristic for individualizing a human hair.

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What is a physical property? What is a chemical property? Name one physical and chemical property of water.

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