question: An allergen is a type of
choices.text: single cell microorganisms occurs over a wide range melanin content protein foreign to the body. specialized cells a small molecule inherited antigens + antibody chemical messengers
choices.label: A B C D E F G H
fact2: Antigens are proteins foreign to the body.
combinedfact: Proteins foreign to the body that cause allergies are called allergens.
formatted_question: An allergen is a type of (A) single cell microorganisms (B) occurs over a wide range (C) melanin content (D) protein foreign to the body. (E) specialized cells (F) a small molecule (G) inherited antigens + antibody (H) chemical messengers