Think about the lab procedure you just read. Label each factor below V if it was variable during the procedure or C if it was constant.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

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.

Evolution acts upon the population of organisms and not on each individual organism