Identify the incorrect statement regarding mosses:
| 1. | Leaves are one cell thick except at the midrib and lack stomata. |
| 2. | The first gametophyte stage is protonema, that is creeping and green. |
| 3. | The second stage is the leafy stage, which develops from the secondary protonema as a lateral bud. |
| 4. | Rhizoids are elongated and unicellular. |