What is the main function of the structures that is identified as a in the picture above

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

This is collection of data made by comparing objects in standard units. in science, the units are metric.

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.