It provides information about past evolution and how organisms used to look like. and also the earth's geography.
Diseases would be the correct answer choice.
Antigens<span> are foreign particles, usually proteins, which are capable of generating an immune response in the body, a property known as immunogenicity. This immune response consists of specific </span>antibodies<span> which are generated by plasma cells as a result of exposure to a specific epitope presented by the </span>antigen<span>.</span>
DNA. DNA is also the most accurate way.
