The theory of evolution that states that a species evolved in spurts of rapid change and then goes through periods of no change is known as
a.) adaptive radiation
b.) convergent evolution
c.) divergent evolution
d.) punctuated equallibruim

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.