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Q. No.Identify the correct description of the structure shown in the given figure:
1.
It shows stomatal apparatus of almost all plants except grasses where A represents guard cells and B represents subsidiary cells.
2.
It shows stomatal apparatus of almost all plants except grasses where A represents subsidiary cells and B represents guard cells.
3.
It shows stomatal apparatus of grasses where A represents subsidiary cells and B represents guard cells.
4.
It shows stomatal apparatus of grasses where A represents guard cells and B represents subsidiary cells.
Subtopic: Epidermal Tissue System |
88%
From NCERT
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Initiation of lateral roots and vascular cambium during the secondary growth in dicot roots takes place in:
1. Epidermis
2. Cortex
3. Endodermis
4. Pericycle
1. Epidermis
2. Cortex
3. Endodermis
4. Pericycle
88%
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The given figure shows the transverse section of:
1. Dicot root
2. Monocot root
3. Dicot stem
4. Monocot stem
1. Dicot root
2. Monocot root
3. Dicot stem
4. Monocot stem
Subtopic: Anatomy of Root |
75%
From NCERT
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Identify the correctly matched pair:
1. I only
2. II only
3. Both I and II
4. Neither I nor II
| Types of vascular tissue | Present in | |
| I. |  |
Roots |
| II. |  |
Monocot stems |
2. II only
3. Both I and II
4. Neither I nor II
Subtopic: Anatomy of Root | Monocot Stem |
90%
From NCERT
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The ‘stele’ in a dicot root will include all the following except:
1. Endodermis
2. Pericyle
3. Vascular bundles
4. Pith
1. Endodermis
2. Pericyle
3. Vascular bundles
4. Pith
Subtopic: Anatomy of Root |
80%
From NCERT
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The parallel venation in monocot leaves is reflected in the:
| 1. | near similar sizes of vascular bundles, including main veins, as seen in vertical sections of the leaves. |
| 2. | near similar sizes of vascular bundles, except in main veins, as seen in vertical sections of the leaves. |
| 3. | large sizes of vascular bundles in mid rib and smaller in veins, as seen in vertical sections of the leaves. |
| 4. | smaller sizes of vascular bundles in mid rib and larger in veins, as seen in vertical sections of the leaves. |
Subtopic: Monocot Leaf |
70%
From NCERT
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In Dorsiventral (Dicotyledonous) Leaf:
1. I is correct; II is correct
2. I is incorrect; II is correct
3. I is incorrect; II is incorrect
4. I is correct; II is incorrect
| I: | The adaxial epidermis generally bears more stomata than the abaxial epidermis. |
| II: | Mesophyll has two types of cells – the palisade parenchyma and the spongy parenchyma. |
1. I is correct; II is correct
2. I is incorrect; II is correct
3. I is incorrect; II is incorrect
4. I is correct; II is incorrect
Subtopic: Dicot Leaf |
83%
From NCERT
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In the transverse section of a dicot stem, the correct chronological order of the appearance of the following structures [from epidermis towards pith] will be:
| 1. | Hypodermis – Pericycle – Endodermis – Vascular bundles |
| 2. | Vascular bundles – Pericycle – Endodermis – Hypodermis |
| 3. | Hypodermis – Endodermis – Pericycle – Vascular bundles |
| 4. | Vascular bundles – Endodermis – Pericycle – Hypodermis |
Subtopic: Dicot Stem |
89%
From NCERT
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Regarding endodermis of dicot roots:
1. I is correct; II is correct
2. I is incorrect; II is correct
3. I is incorrect; II is incorrect
4. I is correct; II is incorrect
| I: | It comprises a single layer of pear-shaped cells with well-developed intercellular spaces. |
| II: | The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material suberin in the form of casparian strips. |
1. I is correct; II is correct
2. I is incorrect; II is correct
3. I is incorrect; II is incorrect
4. I is correct; II is incorrect
Subtopic: Anatomy of Root |
81%
From NCERT
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Bulliform cells:
| 1. | are adaxial epidermal cells in grasses that are large, empty, colourless cells and involved in folding and unfolding of leaf tissue in order to reduce overall water loss. |
| 2. | are adaxial epidermal cells in grasses that are large, empty, colourless cells and involved in regulating the opening and closing of stomata for exchange of gases. |
| 3. | are adaxial epidermal cells in dicot leaves that are filled with thick sap and involved in regulating water content in leaf. |
| 4. | are abaxial epidermal cells in dicot leaves that are similar to vacuoles and involved in storage of toxins and water. |
Subtopic: Vascular Tissue System |
85%
From NCERT
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