Q. No.Which of the following will be true for cells in the meristematic zone at root apex?
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | They are rich in protoplasm, possess large conspicuous nuclei. |
| II: | Their cell walls are primary in nature, thin and cellulosic with abundant plasmodesmatal connections. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Â Growth |
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What shaped curve is a characteristic of living organism growing in a natural environment?
1. S shaped
2. J shaped
3. Rectangular hyperbola
4. A straight line
1. S shaped
2. J shaped
3. Rectangular hyperbola
4. A straight line
Subtopic: Â Growth |
 87%
From NCERT
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Regarding conditions of growth in plants:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | Water provides the medium for enzymatic activities needed for growth. |
| II: | Oxygen helps in releasing metabolic energy essential for growth activities. |
| III: | Nutrients (macro and micro essential elements) are required by plants for the synthesis of protoplasm and act as source of energy. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Â Growth |
 93%
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Which of the following statements is not correct?
| 1. | Phase of cell elongation of plant cells is characterized by increased vacuolation. |
| 2. | Cells in the meristematic phase of growth exhibit abundant plasmodesmatal connections |
| 3. | Plant growth is generally determinate |
| 4. | Plant growth is measurable |
Subtopic: Â Growth |
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NEET - 2023
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Consider the given two statements:
| Assertion (A): | Phenotypic plasticity is more important for plants than for animals. |
| Reason (R): | Plants are sessile and cannot move away from environmental stresses, which necessitates a greater degree of physiological and morphological adaptability. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Growth |
 95%
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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: | Development in plants is the sum of two processes: growth and differentiation. |
| Statement II: | The development of a mature plant from a zygote (fertilised egg) follows a precise and highly ordered succession of events. |
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: Â Growth |
 91%
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The form of growth wherein new cells are always being added to the plant body by the activity of the meristem is called the:
1. closed form of growth.
2. open form of growth.
3. determinate form of growth
4. positive form of growth.
1. closed form of growth.
2. open form of growth.
3. determinate form of growth
4. positive form of growth.
Subtopic: Â Growth |
 94%
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Which of the following, principally, contribute to the elongation of the plants along their axis?
1. Only I and II
2. Only III and IV
3. Only I and III
4. Only II and IV
| I: | Root apical meristem |
| II: | Shoot apical meristem |
| III: | Vascular cambium |
| IV: | Cork-cambium |
1. Only I and II
2. Only III and IV
3. Only I and III
4. Only II and IV
Subtopic: Â Growth |
 88%
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Consider the given two statements:
| Assertion (A): | Growth, at the cellular level, is measured by a variety of parameters, some of which are: increase in fresh weight, dry weight, length, area, volume and cell number. |
| Reason (R): | Growth, at a cellular level, is principally a consequence of an increase in the amount of protoplasm, and increase in protoplasm is difficult to measure directly. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Â Growth |
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The cells in the region of elongation at the root apex are not characterised by:
| 1. | Increased vacuolation | 2. | Cell enlargement |
| 3. | Constant division | 4. | New cell wall deposition |
Subtopic: Â Growth |
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