Which must an animal do in order for cellular respiration to begin?
turn energy into sugars
eat food
gain energy
change sugars into food

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

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.

Has magnification ability of hundreds of thousands of times