Examlex
For each of the impressions listed below, determine which characteristics are class characteristics and which are individual characteristics.
a. Screwdriver pry mark: 0.5 inch wide, filings of stainless steel imbedded in mark, rounded edges, center half-circle groove, 3 wide striations near one edge, 7 narrow striations near one edge
b. Two-dimensional footwear impression: Nike brand, 11 inches long, wear pattern on back outside edge, 4 inches wide at arch, gouge at back heel, "Nike Air" imprinted on arch
c. Recovered bullet: .22 caliber, deep striation in one land, left-handed twist, 13 fine striations in one groove, 5 grooves around periphery, 79% lead composition
Sleep Cycle
The progression through various stages of sleep, including REM and non-REM phases, that occurs several times throughout the night.
Sleep
A naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, and inhibition of nearly all voluntary muscles.
Rest
A period of relaxation, sleep, or inactivity, especially after a period of work or strenuous activity, allowing for recovery and rejuvenation.
External Stimuli
Any factor, force, or influence from outside the body that can evoke a physiological or psychological response.
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