Which of the following correctly explains why viruses are not classified with either prokaryotic or eukaryotic organisms? They cannot reproduce outside a host cell. They contain cells that have no life-giving function.
They have a cell wall and a cell membrane. They are not surrounded by a protein coat.

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.