Which of the following statements is not true for stomatal apparatus?
1. | Inner walls of guard cells are thick |
2. | Guard cells invariably possess chloroplasts and mitochondria |
3. | Guard cells are always surrounded by subsidiary cells |
4. | Stomata are involved in gaseous exhange |
1. | two guard cells plus the subsidiary cells only. |
2. | an opening surrounded by two guard cells. |
3. | an opening surrounded by two guard cells and the subsidiary cells. |
4. | two guard cells only. |
Statements A: | The epidermis is a single-layered structure made up of compactly arranged cells with a large nucleus and no vacuole. |
Statements B: | The cuticle is a waxy layer present on the outer surface of the epidermis that helps in reducing water loss. |
Statements C: | Stomata are structures present in the epidermis of leaves that regulate transpiration and gaseous exchange. |
Statements D: | The guard cells of all plants are bean-shaped and regulate the opening and closing of stomata. |
1. | Guard cells invariably possess chloroplasts and mitochondria |
2. | Guard cells are always surrounded by subsidiary cells |
3. | Stomata are involved in gaseous exchange |
4. | Inner walls of guard cells are thick |