Final answer:
Microtubules play important roles in cell division, cell shape maintenance, and cell motility. They can selectively stabilize and polarize a cell.
Step-by-step explanation:
The selective stabilization of microtubules can polarize a cell. Microtubules are small hollow tubes composed of proteins that play important roles in cell division, cell shape maintenance, and cell motility. During cell division, microtubules help pull replicated chromosomes to opposite ends of a dividing cell. In addition, microtubules can disassemble and reform quickly, allowing for dynamic changes in cell shape and movement.