Which human activity has had the greatest impact on climate change?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

What problem would a person most likely have if her kidney did not work correctly?

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.