| 1 | Some grasses furnish us with food. | |
| 2 | Other plants and grasses also help protect water quality. | |
| 3 | Annual broadleaf and grass weeds are major problems. | |
| 4 | In the grass system, wall formation is inhibited by glycoproteins. | |
| 5 | In the grasses bracts are borne in pairs below the spikelets and are called glumes. |