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Q. No.Well developed pith is present in
1. Dicot stem, monocot root
2. Monocot stem, dicot root
3. Dicot root, dicot stem
4. Monocot root, monocot stem
Subtopic: Anatomy of Root | Dicot Stem |
65%
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Consider the given two statements:
| Assertion (A): | Gymnosperms have vessels in their xylem. |
| Reason (R): | The presence of vessels in gymnosperms helps in the efficient transport of water and minerals. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Complex Tissue: Xylem |
87%
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Subtopic: Anatomy of Root |
71%
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Some vascular bundles are described as open because these
| 1. | are surrounded by pericycle but no endodermis |
| 2. | are capable of producing secondary xylem and phloem |
| 3. | possess conjunctive tissue between xylem and phloem |
| 4. | are not surrounded by pericycle |
Subtopic: Vascular Tissue System |
77%
From NCERT
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Plant cells that lack a nucleus at maturity are:
| 1. | Cambium cells | 2. | Cells of pericycle |
| 3. | Xylem parenchyma | 4. | Sieve tubes |
Subtopic: Complex Tissue: Phloem |
91%
From NCERT
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Gymnosperms lack:
| 1. | Secondary growth | 2. | Vessels in their xylem |
| 3. | Albuminous cells | 4. | A dominant sporophyte |
Subtopic: Complex Tissue: Xylem |
85%
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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 |
Subtopic: Epidermal Tissue System |
82%
From NCERT
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The number of features seen in a dicotyledonous stem from among the features given below is:
| I: | Sclerenchymatous pericycle |
| II: | Casparian strips in endodermis are very common |
| III: | Collechymatous hypodermis |
| IV: | Conjoint open vascular bundles with exarch protoxylem |
| 1. | 4 | 2. | 3 |
| 3. | 2 | 4. | 1 |
Subtopic: Dicot Stem |
56%
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The given diagram shows the transverse section of a:
| 1. | Monocot stem | 2. | Dicot stem |
| 3. | Monocot root | 4. | Dicot root |
Subtopic: Monocot Stem |
72%
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How many of the given statements regarding stomata in plants are correct?
1. 2
2. 3
3. 4
4. 5
| I: | Stomata are structures present in the epidermis of leaves. |
| II: | Stomata regulate the process of transpiration and gaseous exchange. |
| III: | Each stoma is composed of two bean-shaped cells known as subsidiary cells which enclose stomatal pore. |
| IV: | In grasses, the guard cells are dumb-bell shaped. |
| V: | The inner walls of guard cells (towards the stomatal pore) are thin and the outer walls (away from the stomatal pore) are highly thickened. |
1. 2
2. 3
3. 4
4. 5
Subtopic: Epidermal Tissue System |
64%
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