Keratinocytes are an important epidermal cell because ________.
A) they produce a fibrous protein that gives the skin much of its protective properties
B) they are able to transform from living cells to plasma membranes and still function
C) they are able to reproduce sporadically as needed
D) they are a powerful defence against damaging UV rays
Answer: A) they produce a fibrous protein that gives the skin much of its protective properties