- 1(current)
Q. No.Regarding the guard cells:
| 1. | walls away from the stomatal pores are thin and those towards the stomatal pores are thick |
| 2. | walls away from the stomatal pores are thick and those towards the stomatal pores are thin |
| 3. | chloroplasts are mostly absent |
| 4. | play no role in the regulation of opening and closing of stomata |
Subtopic: Dicot Leaf | Monocot Leaf |
83%
From NCERT
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Identify the incorrect matching with respect to anatomy of dicot and monocot leaves?
| Character | Dicot[Dorsiventral] | Monocot [Isobilateral] | |
| 1. | Presence of stomata | More on adaxial epidermis | More on abaxial epidermis |
| 2. | Mesophyll | Differentiated into palisade and spongy parenchyma | Not differentiated into palisade and spongy parenchyma |
| 3. | Venation | Mostly reticulate | Mostly parallel |
| 4. | Size of vascular bundle | Dependent on the size of veins | Near similar size except in main veins |
Subtopic: Monocot Leaf |
90%
From NCERT
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Identify A, B, C and D in the given figure:
| A | B | C | D | |
| 1. | Bundle sheath cells | Palisade mesophyll | Spongy mesophyll | Abaxial epidermis |
| 2. | Bundle sheath cells | Palisade mesophyll | Spongy mesophyll | Adaxial epidermis |
| 3. | Spongy mesophyll | Bundle sheath cells | Palisade mesophyll | Abaxial epidermis |
| 4. | Palisade mesophyll | Spongy mesophyll | Bundle sheath cells | Adaxial epidermis |
Subtopic: Monocot Leaf |
80%
From NCERT
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A diagram of the transverse section of a monocot leaf is given below with certain parts indicated as letters of the alphabet. Select the option which incorrectly matches the alphabet with the part it represents:
| 1. | A - Adaxial epidermis | 2. | B - Phloem |
| 3. | C - Mesophyll | 4. | D - Abaxial epidermis |
Subtopic: Monocot Leaf |
79%
From NCERT
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The parallel venation in monocot leaves is reflected in the:
| 1. | wide variations in size of vascular bundles in the main veins |
| 2. | wide variations in size of vascular bundles except in the main veins |
| 3. | near similar size of vascular bundles in the main veins |
| 4. | near similar size of vascular bundles except in the main veins |
Subtopic: Monocot Leaf |
70%
From NCERT
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In an isobilateral leaf:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | the stomata are present on both the surfaces of the epidermis |
| II: | the mesophyll is not differentiated into palisade and spongy parenchyma |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Monocot Leaf |
87%
From NCERT
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In isobilateral (monocotyledonous) leaf:
1. Only I and II are correct
2. Only II and III are correct
3. I, II and III are correct
4. Only III is correct
| I: | The stomata are present on both the surfaces of the epidermis. |
| II: | The mesophyll is not differentiated into palisade and spongy parenchyma. |
| III: | The parallel venation in monocot leaves is reflected in the near similar sizes of vascular bundles (except in main veins) as seen in vertical sections of the leaves. |
2. Only II and III are correct
3. I, II and III are correct
4. Only III is correct
Subtopic: Monocot Leaf |
86%
From NCERT
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| Statement I: | In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless bulliform cells. |
| Statement II: | When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is exposed. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Monocot Leaf |
87%
From NCERT
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- 1(current)
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