In a dicot root, initiation of lateral roots and vascular cambium during the secondary growth takes place in the cells of:
1. | Outer cortex | 2. | Inner cortex |
3. | Endodermis | 4. | Pericycle |
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In a dicot stem the term 'starch sheath' is used for:
1. | Epidermis with guard cells | 2. | Hypodermis |
3. | Endodermis | 4. | Pericycle |
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During the formation of primary plant body, dermal tissue, ground tissue and vascular tissue are produced by:
1. Primary meristems
2. Secondary meristems
3. Both primary and secondary meristems
4. Neither primary nor secondary meristems
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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. |
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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 |
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The vascular bundles in a dicot stem are:
1. conjoint, open with endarch protoxylem
2. conjoint, closed with endarch protoxylem
3. conjoint, open with exarch protoxylem
4. conjoint, closed with exarch protoxylem
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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 |
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The incorrect statement regarding epidermal tissue system in angiosperms would be:
1. It comprises of epidermal cells and stomata but not the appendages such as trichomes
2. It is the outermost layer of the primary plant body forming a continuous layer
3. It is usually single layered
4. Cells are parenchymatous with a large vacuole
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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 |
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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
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