Topics: Cosmetology Quiz
The range of numbers used in the ph scale is _________.
A. 0 to 5
B. 0 to 10
C. 0 to 7
D. 0 to 14
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The difference between open and closed comedones is the size of the follicle opening, called the _________.
A. Ostium
B. Follicle
C. Comedo
D. pore