Answer the following question: Fact 1: Antigens are molecules that the immune system recognizes as foreign to the body. Fact 2: Bodies are physical entities. Given the two facts above, what are molecules that the immune system recognizes as foreign to the physical entity?

Select from: (1). bacteria. (2). proteins. (3). antibodies. (4). Allergies. (5). negative. (6). immunities. (7). parasites. (8). antigens.
Answer:
(8).