In a dicot stem, the pericycle is present on the inner side of the endodermis and:
1. | above the phloem, in form of semi-lunar patches of sclerenchyma |
2. | above the xylem, in form of semi-lunar patches of sclerenchyma |
3. | above the phloem, in form of semi-lunar patches of collenchyma |
4. | above the xylem, in form of semi-lunar patches of collenchyma |
In a dicot stem the term 'starch sheath' is used for:
1. | Epidermis with guard cells | 2. | Hypodermis |
3. | Endodermis | 4. | Pericycle |
In the given diagram, the root apical meristem is represented by the letter:
1. A |
Regarding the guard cells:
1. | walls away from the stomatal pores are thin and those towards the stomatal pores are thick |
2. | walls away from the stomatal pores are thick and those towards the stomatal pores are thin |
3. | chloroplasts are mostly absent |
4. | play no role in the regulation of opening and closing of stomata |
All the following statements regarding the anatomy of a typical dicotyledonous root are correct except:
1. | Many cells of the epiblema protrude in the form of unicellular root hairs. |
2. | The innermost layer of the cortex is called as the endodermis. |
3. | Pericycle is made up of collenchymatous cells. |
4. | Parenchymatous conjunctive tissue lies between the xylem and phloem. |
The type of vascular bundles shown in the given figure would most likely be seen in:
1. | Dicotyledonous stem | 2. | Roots |
3. | Monocotyledonous stem | 4. | Leaves |
What would be true for A and B shown in the given diagram?
1. | A shows open stomatal aperture while B shows closed stomatal aperture |
2. | A shows closed stomatal aperture while B shows open stomatal aperture |
3. | A shows the stomata in grasses |
4. | B shows the stomata in grasses |
The meristem that helps grasses regenerate parts removed by the grazing herbivores is the:
1. | Shoot apical meristem | 2. | Root apical meristem |
3. | Intercalary meristem | 4. | Lateral meristem |
All the following are true for trichomes except:
1. | they are usually unicellular |
2. | they may be branched |
3. | they may be secretory |
4. | they help in prevention of water loss due to transpiration |
Mesophyll cells present in the ground tissue of leaves are:
1. chloroplasts lacking thin walled cells
2. chloroplasts containing thick walled cells
3. chloroplasts containing thin walled cells
4. chloroplasts lacking thick walled cells