Dynamic instability observed in tubulin is important because a. it helps to stabilize stress fibers. b. it builds a network that holds cells together in a sheet. c. it allows cells to respond rapidly to changes. d. it is the checkpoint for progression to anaphase. e. it determines the direction of vesicular transport along the fibers.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.