The Law of Conservation of mass is important because then when performing a chemical reaction scientists can determine about the amount of substance that will be produced.
A structure formed from molecules that combine to make up cells is called an atom.
Lymphocytes generated during an initial infection that circulate in the body for years and quickly destroy that infection if it ever appears again are called the Memory t cells. These cells are a subset of infection that have previously encountered and responded to their respective antigen, thus they may be called the antigen experienced t cells.
