c. The cytoskeleton of eukaryotes serves many functions. One of these functions is served in eukaryotes by a different major structure. Which structural feature is it? How do these different structures serve the same function in the two cell types?

Is it the cell wall?

Thanks
-MC

yes, that is loosely it.

http://en.wikipedia.org/wiki/Cytoskeleton

No, it is not the cell wall. The structural feature served in eukaryotes by a different major structure than the cytoskeleton is the extracellular matrix (ECM).

The cytoskeleton is a network of protein filaments within the cytoplasm of eukaryotic cells, providing structural support and enabling cell movement and shape changes. It is composed of three main types of filaments: microtubules, microfilaments, and intermediate filaments.

On the other hand, the extracellular matrix is a complex meshwork of proteins and carbohydrates that surrounds the cells in multicellular organisms. It is mainly composed of proteins such as collagen, fibronectin, and laminin. The ECM provides mechanical support, organizes tissue architecture, and influences cell behavior by transmitting mechanical and biochemical signals.

Both the cytoskeleton and the extracellular matrix serve the function of providing structural support to cells. However, they do so in different ways and locations. The cytoskeleton is located within the cell and is responsible for maintaining cell shape, supporting cell movement, and facilitating intracellular transport. The ECM, on the other hand, is located outside the cell and provides structural support to tissues, helps anchor cells together, and facilitates cell-to-cell communication.

In summary, while the cytoskeleton serves the function of providing structural support within the cell, the extracellular matrix serves a similar function but in the extracellular space outside the cell.