Question

c. skin cancer
d. pores

1. describe the difference between a whitehead and a blackhead.

Explanation:

A whitehead is a closed comedone with a blocked pore under the skin (appears white). A blackhead is an open comedone with a blocked pore exposed to air, causing melanin oxidation (appears black).

Answer:

Whiteheads are closed comedones (blocked pores under skin, white appearance); blackheads are open comedones (blocked pores exposed to air, black due to melanin oxidation).