The picture shows a cell undergoing cell division. The outermost layer of the cell is the cell membrane, which is labeled as A. The cell plate, labeled as B, is the structure that forms between the two daughter cells during cell division. The cell wall, labeled as C, is the rigid structure that surrounds the cell and provides support. The cleavage furrow, labeled as D, is the indentation that forms in the cell membrane as the cell begins to divide.