What organelles are long slender tubes found near the membrane and used for support and cell division?

The organelles you're referring to are microtubules, which are components of the cytoskeleton. They are long, slender tubes made of tubulin protein that provide structural support to the cell and play a crucial role in cell division by forming the mitotic spindle. Microtubules also facilitate intracellular transport and help maintain the shape of the cell.