life is organized in a hierarchical fashion. which sequence correctly lists that hierarchy from least inclusive to most inclusive?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success

There are only about 250,000 known fossil species. true or false