Q. No.The xylem tissue in gymnosperms lacks:
1. Tracheids
2. Vessels
3. Xylem fibers
4. Xylem parenchyma
1. Tracheids
2. Vessels
3. Xylem fibers
4. Xylem parenchyma
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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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In their phloem tissue, gymnosperms have:
1. Sieve cells and Companion cells
2. Albuminous cells and Sieve cells
3. Sieve tubes and Companion cells
4. Sieve tubes and Albuminous cells
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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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Which of the following is a feature of the anatomy of a monocot stem?
| I: | Collenchymatous hypodermis |
| II: | Scattered vascular bundles |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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The sieve tube elements and the companion cells are connected by:
1. sieve pores in their common transverse wall
2. sieve pores in their common longitudinal wall
3. pit fields in their common longitudinal wall
4. pit fields in their common transverse wall
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In a monocot stem:
| 1. | Each vascular bundle is surrounded by a sclerenchymatous bundle sheath |
| 2. | Ground tissue is very poorly developed |
| 3. | Vascular bundles are conjoint and open with water containing cavities |
| 4. | Phloem parenchyma is present |
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The apical meristems in the plants:
| 1. | occur at the tips of both roots and shoots and produce primary tissues |
| 2. | occur at the tip of root and base of the stem and produce secondary tissues |
| 3. | occur at the base of root and tip of the stem and produce primary tissues |
| 4. | occur at the tips of both roots and shoots and produce secondary tissues |
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In stems:
| 1. | the primary xylem is endarch with protoxylem towards the center and metaxylem towards the periphery |
| 2. | the primary xylem is endarch with metaxylem towards the center and protoxylem towards the periphery |
| 3. | the primary xylem is exarch with protoxylem towards the center and metaxylem towards the periphery |
| 4. | the primary xylem is exarch with metaxylem towards the center and protoxylem towards the periphery |
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