| 1. | Pith cells | 
| 2. | Hypodermal cells | 
| 3. | Meristem present in stelar region | 
| 4. | Endodermal cells | 
| 1. | Dicotyledonous stem | 
| 2. | Dicotyledonous root | 
| 3. | Monocotyledonous stem | 
| 4. | Monocotyledonous root | 
| 1. | Transverse only | 
| 2. | Tangential only | 
| 3. | Transverse and radial | 
| 4. | Tangential and radial | 
| 1. | incapable of transforming into another cell type. | 
| 2. | composed of small cells. | 
| 3. | comprised of only one cell type. | 
| 4. | always isodiametric. | 
| 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. | 
| 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. | 
| 1. | enable the leaf to fold. | 
| 2. | are found in the endodermis. | 
| 3. | are highly photosynthetic. | 
| 4. | are characteristic of xeromorphic plants. |