Which of the following statements about tolerance range is true? a. Tolerance range is different for different organisms. B. The tolerance range is the total number of organisms that can be supported by an ecosystem. C. Tolerance range is affected by biotic factors in an ecosystem. D. The available water supply does not impact an organism’s tolerance range. Please select the best answer from the choices provided A B C D.

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.