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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 |
87%
Level 1: 80%+
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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%
Level 2: 60%+
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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%
Level 1: 80%+
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The given figure shows the transverse section of:
| 1. | Isobilateral (Monocotyledonous) Leaf; where A is xylem and B is phloem |
| 2. | Isobilateral (Monocotyledonous) Leaf; where A is phloem and B is xylem |
| 3. | Dorsiventral (Dicotyledonous) Leaf; where A is xylem and B is phloem |
| 4. | Dorsiventral (Dicotyledonous) Leaf; where A is phloem and B is xylem |
Subtopic: Monocot Leaf |
77%
Level 2: 60%+
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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%
Level 2: 60%+
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The number of correct statements regarding anatomy of dicot stems is:
1. 1
2. 2
3. 3
4. 4
| Statement I: | Hypodermis consists of a few layers of collenchymatous cells. |
| Statement II: | The cells of the endodermis are rich in protein granules. |
| Statement III: | Pericycle is in the form of semi-lunar patches of sclerenchyma. |
| Statement IV: | The ‘ring’ arrangement of vascular bundles is a characteristic of dicot stem. |
2. 2
3. 3
4. 4
Subtopic: Dicot Stem |
70%
Level 2: 60%+
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Suberin deposition in the form of Casparian strips is found on which of the following walls of endodermal cells?
| 1. | Transverse only |
| 2. | Tangential only |
| 3. | Transverse and radial |
| 4. | Tangential and radial |
Subtopic: Anatomy of Root |
75%
Level 2: 60%+
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Trichomes in stems can perform all the following functions except:
| 1. | Generate secretory products to cause sting. |
| 2. | Reduce herbivory. |
| 3. | Bring about greater water loss through extended surface area of the epidermis. |
| 4. | Provide shade. |
Subtopic: Epidermal Tissue System |
67%
Level 2: 60%+
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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%
Level 1: 80%+
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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 |
78%
Level 2: 60%+
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