Obergfell213 Obergfell213

16-06-2015
Biology

Answered

Responses of the immune system to usually

harmless environmental substances are known as

(1) antigen production

(2) chromosomal mutations

(3) pathogens

(4) allergies

Verified Answer :

16-06-2015

The immune system over-reacts to normally harmless substances, the name of a substance or substances that cause these over-reactions are called allergies

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