One of the most important observations made by darwin on his trip around the world was: question 1 options: species have remained constant over time in some places but not in others species remain constant from place to place dna from all species is very similar species have remained constant over time species change from place to place and throughout time save

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.