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Author Question: Skin is protected by a thick, oily substance called _____. A) sebum B) keratin C) melanin D) ... (Read 124 times)

Deast7027

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Skin is protected by a thick, oily substance called _____.
 A) sebum
  B) keratin
  C) melanin
  D) mucus

Question 2

Nails are formed by the _____ layer.
 A) epidermal
  B) dermal
  C) hypodermal
  D) subcutaneous



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stillxalice

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Answer to Question 1

A

Answer to Question 2

A




Deast7027

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Reply 2 on: Feb 27, 2019
Excellent


xiaomengxian

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Reply 3 on: Yesterday
:D TYSM

 

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