Please help me asap! Thank you so much! What is the most harmful form of air pollution: CFCs, carbon dioxide or sulfur/nitrogen containing gas? Defend your answer. (Please explain why you think that is the most harmful form of air pollution)

What goes in and out of a cell respiration?

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.

The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. what area of the spinal cord is destroyed