Divide. -A)

question 326

Multiple Choice

Divide.
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Definitions:

Parasites

Organisms that live on or inside another organism (the host) and benefit at the host's expense, often causing harm.

Antigens

Substances, usually proteins, on the surface of bacteria, viruses, and other foreign substances, that trigger an immune response in the body.

Allergens

Substances that cause allergic reactions by triggering an immune response in susceptible individuals.

Lymphocytes

White blood cells that circulate through the lymph system and bloodstream, helping the body identify and destroy antigens and cancer cells.