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
Open vascular bundles:
I: | have cambium present between xylem and phloem |
II: | possess the ability to form secondary tissues |
III: | are rare in dicotyledonous stems |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
All the following are examples of secondary or lateral meristems except:
1. | Fascicular vascular cambium | 2. | Intercalary meristem |
3. | Interfascicular meristem | 4. | Cork cambium |
In conjoint type of vascular bundles:
I: | xylem and phloem are jointly situated on the same radius of vascular bundles. |
II: | xylem is usually located on the outer side of the phloem. |
1. Only I is correct | 2. Only II is correct |
3. Both are correct | 4. Both are incorrect |
Casparian strips are:
1. | waxy deposition of suberin on only the tangential walls of the endodermal cells |
2. | waxy deposition of suberin on only the radial walls of the endodermal cells |
3. | waxy deposition of suberin on both tangential and radial walls of the endodermal cells |
4. | waxy deposition of lignin on both tangential and radial walls of the endodermal cells |