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Leya [2.2K]
2 years ago
6

Cells of the immune system are able to respond to the

Chemistry
1 answer:
egoroff_w [7]2 years ago
5 0

Answer:

A) antigens present on the invaders

Explanation:

Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens

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