Adixon63
Adixon63 Adixon63
  • 25-01-2022
  • Biology
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i need help please somebody​

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ManFaceAnswers
ManFaceAnswers ManFaceAnswers
  • 25-01-2022

Answer:

Question 21 is B. Serving as a barrier.

Question 22 is C. Immune

Explanation:

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