* Nuclei: Roots are composed of plant cells, and all plant cells have a nucleus. The nucleus contains the cell's genetic material (DNA) and controls the cell's activities.

* Cell Walls: Plant cells, including those in roots, have rigid cell walls made of cellulose. These walls provide structural support and help maintain the plant's shape.

So, while roots might look different than the leaves or flowers of a plant, they are still made up of the same basic building blocks: cells with nuclei and cell walls.