Which best describes the cell theory?
a. scientists know all there is to know about cells, so the cell theory will not change.
b. as technological advancements are made, the cell theory may change.
c. a theory, once formulated, cannot be changed.
d. the development of a synthetic cell has caused the cell theory to change.

Suppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer

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.

Which of the following is not a type of epithelial cell