Q. No.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
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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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
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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 |
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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 |
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In a dicot root, the number of patches of xylem and phloem are usually:
| 1. | 2 to 4 | 2. | 4 to 6 |
| 3. | 6 to 8 | 4. | 8 to 10 |
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The term ‘stele’in a dicot root does not include:
| 1. | Endodermis | 2. | Pericycle |
| 3. | Vascular bundles | 4. | Pith |
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Monocot root anatomy is different from the anatomy of dicot root in all the following aspects except:
1. More developed pith
2. Polyarch vascular bundles
3. Absence of secondary growth
4. Presence of multicellular root hairs
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The hypodermis of a dicotyledonous stem:
1. is parenchymatous and synthesizes and stores food
2. is collenchymatous and provides mechanical strength to the young stem
3. is sclerenchymatous and provides mechanical strength to the young stem
4. is parenchymatous and provides mechanical strength to the young stem
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The ring arrangement of vascular bundles is a characteristic feature of:
| 1. | Monocot stem | 2. | Dicot stem |
| 3. | Monocot root | 4. | Dicot root |
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