Antigens are substances capable of mobilizing the<u> </u><u>IMMUNE SYSTEM</u>
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<u>Your answer would be: </u> IMMUNE SYSTEM
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<u>Hope that helps! </u> : )
1.inorganic
2.occurs natural (synthetic diamonds are not)
3.has atoms arranged in an orderly patter/structure
4.has a definite chemical composition
5. are solid
I hoped this helped :)
The answer for question 1 is (C)