Well everything is made of complex proteins. There isn't one single organism just comprised of proteins. For example keratin is a protein that is made when RNA passes through a ribosome. Now this protein may be used in different functions, one is to strengthen hair/nails. To simplify: anything living that is eukaryotic. (multi_cellular organisms bigger than bacteria and viruses.)
If you use more than one independent variable at a time, and will observe a change, you will not know which variable contributed to a changed result.
Galaxy, solar system, star, planet, moon
Antigens are proteins that are found on the surface of the pathogen and are viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles. Antigens are usually carried by proteins and polysaccharides, and less frequently, lipids but it also needs to be attached to a large carrier molecule which is usually a protein. When an antigen enters the body, the immune system produces antibodies against it. The Antigen stimulates the immune system to produce antibodies. YOUR WELCOME ;)
