This type of mutation is called somatic mutation. It usually happens in different cells of the body, but not in the eggs and sperms. These mutation may cause cancer and other illnesses, but it cannot be passed on to future offspring.
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Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.
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Ion know
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Somebody answer am taking the test tooo