What do you mean by responsible? Do you want to know the genetics behind it, what the surface markers do, or why they are metically important? I think I can help.
Answer:
it is called permissive interaction
Explanation:
The answer will be haptens because haptens has the ability of combining to carriers that are large enough to produce antibodies. The large carriers are usually the proteins that binds to it after producing antibodies. The antibodies, ions and reagins does not comply in the question above for antibodies focus more in the immunization. The ions are the electrons that produce positive or negative electric charge and the reagins are the ones responsible in allergic reactions.
Mammal bird reptile amphibian plant Fish
Answer:
7 Neutrons
Explanation:
There are 7 Neutrons, 7 Protrons, and 7 Electrons, in Nitrogen. If you are unclear, try looking at the periodic table. :)