$A$ molecule that elicits an immune response is called

The treatment of snake bite by antivenom is an example of

What happens in active acquired immunity?

The yellowish fluid "colostrum" secreted by mammary glands of the mother during the initial days of lactation has abundant antibodies $(IgA)$ to protect the infant. This type of immunity is called:

Why is an antibody molecule represented as $H_2L_2$?

When ready-made antibodies are directly given to protect the body against foreign agents,it is called . . . . . . .