It's called major histocompatibility complex protein
Explanation:
There are several types of antibodies and antigens, and each antibody is capable of binding only to a specific antigen. ... Antigens are bound to antibodies through weak and noncovalent interactions such as electrostatic interactions, hydrogen bonds, Van der Waals forces, and hydrophobic interactions.
Antibodies attach to a specific antigen and make it easier for the immune cells to destroy the antigen. T lymphocytes attack antigens directly and help control the immune response. They also release chemicals, known as cytokines, which control the entire immune response.
Gradualism is a pattern of evolution in which a species evolves at a slow, steady space. The correct answer is C.
Parasites are mostly associated with meats ,Chicken would be the most common answer.
