Antigens are Multiple Choice something made by a white blood cell to destroy a pathogen. membrane receptors on B-lymphocytes. disorders involving overactive immune systems. something that an antibody or T-lymphocyte binds to.

Something that an antibody or T-lymphocyte binds to

Explanation:

As per the definition, antigens are the substances or molecules that are capable of inducing an immune response. When our immune system detects any unwanted substance or molecule in our body, the specific type of antibody is made against that antigenic substance and the antibody made against it binds to the antigen so that the other immune cells can recognize it and destroy it and protect us form its harmful effect. T-cell are also involved in recognizing antibodies and specific T-cell can bind to the antigen.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the tricuspid valve is present between right atrium and right ventricle