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Of the four types of T cells,only the ____________________ T cells destroy infected body cells.
Protons
Positively charged subatomic particles found in the nucleus of an atom, contributing to the atom's overall charge and mass.
Molecules
The smallest units of a chemical substance that can exist independently while retaining the properties of the substance.
Mole
The atomic mass of an element or the molecular mass of a compound, expressed in grams; one mole of any substance has 6.02 x 10^23 units (Avogadro’s number).
Covalent Bonds
Chemical bonds formed by the sharing of electron pairs between atoms.
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