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Q. No.Consider the given two statements – an Assertion [A] and a Reason [R] – and select the correct option as your answer:
A:
Monocots do not form secondary tissues.
R:
The vascular bundles have no cambium present in them.
1.
Both Assertion and Reason are true but Reason does not correctly explain Assertion
2.
Assertion is true; Reason is false
3.
Both Assertion and Reason are true and Reason correctly explains Assertion
4.
Assertion is false; Reason is true
84%
From NCERT
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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%
From NCERT
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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%
From NCERT
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Ground tissue in plant body consists of:
1. Only I and II are correct
2. Only III and IV are correct
3. I, II, III and IV are correct
4. Only I, III and IV are correct
| I: | all tissues except epidermis and vascular bundles. |
| II: | simple tissues such as parenchyma, collenchyma and sclerenchyma. |
| III: | parenchymatous cells in cortex, pericycle, pith and medullary rays, in the primary stems and roots. |
| IV: | thin-walled chloroplast containing cells called mesophyll in leaves. |
1. Only I and II are correct
2. Only III and IV are correct
3. I, II, III and IV are correct
4. Only I, III and IV are correct
Subtopic: Ground Tissue System |
76%
From NCERT
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Consider the given two statements:
1. Statement I is incorrect; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is incorrect
| Statement I: | In roots, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. |
| Statement II: | In stems, the protoxylem lies towards periphery and metaxylem lies towards the centre. |
1. Statement I is incorrect; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is incorrect
Subtopic: Anatomy of Root |
83%
From NCERT
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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%
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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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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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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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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