Photovoltaic cells and hydrogen fuel cells share which of the following advantages? I. No emission of air pollutants
II. Abundance of resource
III. Inexpensive compared to other resources

A. I only
B. II only
C. I and II only
D. I, II, and III

Which of the following is an example of a tissue on the digestive system a.the stomach b.smooth muscle that lines the stomach c.nerve cells in the stomach d. enzyme molecules in the stomach

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.

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.