a cell wall provides support / protection / shape / structure for a plant cell
plant_cells has cell_wall plant_cell_wall is not cell_wall. cell_wall is not cell_part. prokaryotic_cell_wall is cell_wall. cell_wall is cell_plate_material. cell_wall is cell_part. plant_cells has not cell_wall plant_cell_wall is cell_wall. plant_cell is cell. cell_wall is layer.