Fact 1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens.

Fact 2: ALL immunogens are antigens.

Given the two facts above, answer the question "What can antibodies (large Y-shaped proteins) recognize and bind to?" with the following options: 
- animals
 - fish
 - blood types
 - positive
 - immunogens
 - cats
 - humans
 - the skin


 

     immunogens    