| 1 | Plants breath in air and breath out moisture through tiny pores called stomata. | |
| 2 | The carbon dioxide enters the plants through tiny holes or pores on the surface of leaves. | |
| 3 | You then have glue which is fermented by yeast so its full of holes with air and salt. | |
| 4 | Lastly, it needs to be covered with a layer of non-porous, non-cracked rock to provide a leakproof cap. | |
| 5 | The pattern made by the cells of a leaf' s stomatal openings can help paleobotanists to identify it. |