Q. No.Consider the given two statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
| Statement I: | The root apical meristem and the shoot apical meristem are responsible for the primary growth of the plants and cause the increase in the girth of the organs in which they are active. |
| Statement II: | In dicotyledonous plants and gymnosperms, the lateral meristems, vascular cambium and cork-cambium principally contribute to the elongation of the plants along their axis. |
1. Statement I is correct; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
Subtopic: Growth | Growth Model | Development | Differentiation, Dedifferentiation and Redifferentiation |
75%
From NCERT
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The cells of which zone at the root apex attain their maximal size in terms of wall thickening and protoplasmic modifications?
1. Root cap
2. Meristematic zone
3. Elongation zone
4. Maturation zone
1. Root cap
2. Meristematic zone
3. Elongation zone
4. Maturation zone
Subtopic: Growth | Growth Terminology | Development | Differentiation, Dedifferentiation and Redifferentiation |
76%
From NCERT
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In plants, during growth and development:
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
| I: | Turgidity of cells helps in extension growth. |
| II: | Water provides the medium for enzymatic activities needed for growth. |
| III: | Oxygen helps in releasing metabolic energy essential for growth activities. |
| IV: | Nutrients (macro and micro essential elements) are required for the synthesis of protoplasm and act as source of energy. |
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Growth | Growth Terminology | Differentiation, Dedifferentiation and Redifferentiation |
90%
From NCERT
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Consider the given two statements:
| I: | Differentiation in plants is open. |
| II: | Cells/tissues arising out of the same meristem have different structures at maturity. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
57%
From NCERT
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In plants, the living differentiated cells, have lost the capacity of division under certain conditions. This phenomenon is termed as:
| 1. | Dedifferentiation | 2. | Proto-differentiation |
| 3. | Redifferentiation | 4. | Secondary differentiation |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
53%
From NCERT
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Formation of interfascicular cambium and cork cambium in certain plants is an example of:
| 1. | Differentiation | 2. | De-differentiation |
| 3. | Re-differentiation | 4. | Anti-differentiation |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
81%
From NCERT
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Which of the following is not formed as result of re-differentiation in plants?
1. Cork cambium
2. Phellem
3. Periderm
4. Secondary xylem
1. Cork cambium
2. Phellem
3. Periderm
4. Secondary xylem
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
66%
From NCERT
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Which of the following correctly pairs the process with an example?
1. Only A is correct
2. Only B is correct
3. Both A and B are correct
4. Neither A nor B is correct
| A. | Differentiation | - | The formation of xylem and phloem from meristematic tissue |
| B. | Dedifferentiation | - | Formation of secondary xylem |
2. Only B is correct
3. Both A and B are correct
4. Neither A nor B is correct
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
51%
From NCERT
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When a cell in plants differentiates to form a tracheary element:
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: | it would gain a lot of protoplasm. |
| II: | it develops a very strong, elastic, lignocellulosic secondary cell walls. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Growth Model | Differentiation, Dedifferentiation and Redifferentiation |
74%
From NCERT
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The examples of de-differentiation in plants include:
| I: | Formation of a tumour. |
| II: | Parenchyma cells made to divide under controlled laboratory conditions during plant tissue culture. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Growth Terminology | Development | Differentiation, Dedifferentiation and Redifferentiation |
64%
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