Fact 1: Dilation occurs when cell walls relax. Fact 2: Animals have no cell walls. Given the two facts above, dilation occurs when part of a cell that a what does not have relaxes.?
Choose your answer from:
(A). breathing
(B). organ
(C). the eyes
(D). abrasion
(E). complex
(F). animal
(G). nerves
(H). retina
(F).