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The first line of defense for keeping pathogens out of the body is the _____. a. skin b. antibodies c. immune system d. white blood cells
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2 votes
The first line of defense for keeping pathogens out of the body is the _____.

a. skin
b. antibodies
c. immune system
d. white blood cells

User Lars Lau Raket
by
8.2k points

2 Answers

2 votes

I just took the test and the answer is A

User Nmoliveira
by
7.4k points
3 votes
The Answer to this problem would be "A" Skin☺
User Scott Silvi
by
8.9k points
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