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Q. No.The development of the root primary xylem is said to be:
1. Exarch
2. Endarch
3. Centrifugal
4. Diffuse
Subtopic: Complex Tissue: Xylem |
87%
From NCERT
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In the vascular bundle of a typical monocot such as corn, the structure that is most likely absent will be:
| 1. | Metaxylem | 2. | Cambium |
| 3. | Protoxylem lacuna | 4. | Metaphloem |
Subtopic: Vascular Tissue System |
91%
From NCERT
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In a dorsiventral [dicot] leaf, the vascular bindles present in the midrib are:
1. smallest in size
2. largest in size
3. equal in size to others
4. radial
1. smallest in size
2. largest in size
3. equal in size to others
4. radial
Subtopic: Dicot Leaf |
74%
From NCERT
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The transverse section of a dicot root is unlikely to show the presence of a conspicuous:
1. cortex
2. pericycle
3. pith
4. endodermis
1. cortex
2. pericycle
3. pith
4. endodermis
Subtopic: Dicot Leaf |
82%
From NCERT
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In a dicot stem, the term ‘starch sheath’ is often used to indicate:
1. The hypodermis
2. The endodermis
3. The pericycle
4. The medullary rays
1. The hypodermis
2. The endodermis
3. The pericycle
4. The medullary rays
Subtopic: Dicot Stem |
79%
From NCERT
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Identify the correct statements:
I: Guard cells are dumbbell shaped in dicots
II: Initiation of lateral roots and vascular cambium during the secondary growth takes place in pericycle cells in dicot roots.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
I: Guard cells are dumbbell shaped in dicots
II: Initiation of lateral roots and vascular cambium during the secondary growth takes place in pericycle cells in dicot roots.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Anatomy of Root |
78%
From NCERT
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The type of vascular bundle shown in the given figure is seen in:
1. Only I
2. Only II and III
3. Only I and II
4. Only II
| I: | Roots |
| II: | Monocot stems |
| III: | Dicot stems |
1. Only I
2. Only II and III
3. Only I and II
4. Only II
Subtopic: Vascular Tissue System |
85%
From NCERT
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Consider the two statements:
| Assertion (A): | Secondary growth takes place in dicot stems but not in monocot stems. |
| Reason (R): | Hypodermis is collenchymatous in dicot stems while it is sclerenchymatous in monocot stems. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True but (R) does not explain (A) |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True and (R) correctly explains (A) |
Subtopic: Dicot Stem | Activity of Vascular Cambium (OLD NCERT) |
85%
From NCERT
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Water containing cavities within the vascular bundles is a feature of the anatomy of a:
1. Monocot stem
2. Dicot stem
3. Monocot root
4. Dicot root
1. Monocot stem
2. Dicot stem
3. Monocot root
4. Dicot root
Subtopic: Monocot Stem |
84%
From NCERT
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What will be true for the figure showing the transverse section of an angiosperm root?
I: It is a section of a dicot root.
II: Secondary growth will be well marked later in this root.
III: The vascular bundles shown are radial and polyarch.
I: It is a section of a dicot root.
II: Secondary growth will be well marked later in this root.
III: The vascular bundles shown are radial and polyarch.
| I | II | III | |
| 1. | T | T | T |
| 2. | F | F | F |
| 3. | F | F | T |
| 4. | T | T | F |
Subtopic: Anatomy of Root |
71%
From NCERT
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