Ecologists often use modeling, instead of field studies, because it
question 18 options:

allows them to control all of the variables involved.

them collect more samples.

is less expensive than working in the field.

lets them study many organisms at once.

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.