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Author Question: Skin is protected by a thick, oily substance called _____. A) sebum B) keratin C) melanin D) ... (Read 101 times)

Deast7027

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on: Feb 27, 2019
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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Reply #1 on: Feb 27, 2019
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
Gracias!

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