Question

Many scientists and dermatologists believe that extrinsic factors such as sun exposure or smoking are responsible for up to ____ percent of skin aging.

A) 70%
B) 80%
C) 90%
D) 60%

Answer 1

Extrinsic factors such as sun exposure or smoking are responsible for up to 90% of skin aging. UV radiation damages the skin's genetic material, leading to the formation of tumors and an increased risk of skin cancer.

Step-by-step explanation:

Extrinsic factors such as sun exposure or smoking are responsible for up to 90% of skin aging. All UV radiation can damage collagen fibers, resulting in an acceleration of the aging process of skin and the formation of wrinkles. UV radiation damages the genetic material (DNA) of skin cells, causing them to grow out of control and form tumors, which can lead to skin cancer.