I: | Stomata are structures present in the epidermis of leaves. |
II: | Stomata regulate the process of transpiration and gaseous exchange. |
III: | Each stoma is composed of two bean-shaped cells known as subsidiary cells which enclose stomatal pore. |
IV: | In grasses, the guard cells are dumb-bell shaped. |
V: | The inner walls of guard cells (towards the stomatal pore) are thin and the outer walls (away from the stomatal pore) are highly thickened. |
Statement I: | Hypodermis consists of a few layers of collenchymatous cells. |
Statement II: | The cells of the endodermis are rich in protein granules. |
Statement III: | Pericycle is in the form of semi-lunar patches of sclerenchyma. |
Statement IV: | The ‘ring’ arrangement of vascular bundles is a characteristic of dicot stem. |
1. | Generate secretory products to cause sting. |
2. | Reduce herbivory. |
3. | Bring about greater water loss through extended surface area of the epidermis. |
4. | Provide shade. |
I: | Roots |
II: | Monocot stems |
III: | Dicot stems |
1. | Stems only | 2. | Root and Stems |
3. | Stems and Leaves | 4. | Root, Stems and Leaves |
1. | Isobilateral (Monocotyledonous) Leaf; where A is xylem and B is phloem |
2. | Isobilateral (Monocotyledonous) Leaf; where A is phloem and B is xylem |
3. | Dorsiventral (Dicotyledonous) Leaf; where A is xylem and B is phloem |
4. | Dorsiventral (Dicotyledonous) Leaf; where A is phloem and B is xylem |