A paleonologist is a scientist who studies forms of life that existed in past geological time periods. One of the main ways a paleontologist gets information by studying fossils. Over time, scientists find fossils. This normally results in-

A:scientific views changing as new knowledge is gained
B:scientific views remaining the same despite new knowledge
C: scientists refusing to report new findings to others

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.