Circulatory systems in molluscs: a) are closed in all species of molluscs. b) are open in species of large-sized molluscs and are closed in species of small-sized molluscs. c) are open in species of small-sized molluscs and are closed in species of large-sized molluscs. d) are open in all species of molluscs. e) are open or closed without regard to body size.

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.