Forensics review -hair/fiber

Natural fibers can be harvested from

• plants and animals only

• plants, animals and minerals

• animals only

• plants only

The outside layer of a hair (compared to the ink on a pencil) is the ___

• medulla
• cortex
• cuticle
• keratin

The middle layer of a hair (compared to the wood of a pencil) is the __

• medulla
• cortex
• cuticle
• keratin

The deepest layer of hair (compared to the lead of a pencil) is the ___

• medulla
• cortex
• cuticle
• keratin 

Which layer of hair is the most helpful component when determining what type of animal the hair came from?

• medulla

• cortex

• cuticle

The name for man-made fibers is:

• processed fibers
• synthetic fibers
• natural fibers
• modified fibers

Tags

NGSS.MS-PS1-3

In which phase of hair growth is hair actively growing?

• anagen
• catagen
• telogen
• melanen

Which phase of hair growth is the intermediate period of hair growth and lasts about three weeks?

• anagen
• catagen
• telogen
• melanen

Which phase of hair growth is the final phase of hair growth that results in hair loss and lasts about three months?

• anagen
• catagen
• telogen
• melanen

Which phase of hair growth usually lasts three to five years?

• anagen
• catagen
• telogen
• melanen