Final answer:
The microtubular cytoskeleton is dynamic due to the rapid assembly and disassembly of microtubules, which are essential for maintaining cell shape, intracellular transport, and chromosome segregation during cell division.
Step-by-step explanation:
The dynamic character of the microtubular cytoskeleton is well-illustrated by its ability to rapidly assemble and disassemble. Comprised of polymerized dimers of α-tubulin and β-tubulin, microtubules form hollow tubes which serve as the skeletal structure for maintaining cell shape, among other functions. These structures can quickly reorganize to facilitate various cellular processes, like the movement of organelles and vesicles inside the cell, chromosome segregation during cell division, and the functionality of cilia and flagella which contribute to cellular motility. In addition, the interaction with motor proteins such as dynein and kinesin allows microtubules to transport cellular 'cargo' from one location to another within the cell, adding to the dynamic nature of the cytoskeleton.