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Q. No.The difference between arithmetic and geometric growth in plants is that:
1.
Arithmetic growth involves an increase in size only, while geometric growth involves an increase in number
2.
In arithmetic growth, one daughter cell continues to divide, while in geometric growth, both do
3.
Arithmetic growth is exponential, while geometric growth is linear
4.
Geometric growth involves cell division and enlargement, while arithmetic growth involves only division
Subtopic: Growth Model |
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Consider the given two statements:
| Assertion (A): | Gibberellins are used for apple shaping. |
| Reason (R): | Gibberellins stimulate the elongation of apple cells, enhancing their symmetry and size. |
| 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: Gibberellin |
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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 |
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Apical dominance is the phenomenon where the main central stem of the plant is dominant over (grows more vigorously than) the other side stems. Which hormone is responsible for apical dominance?
| 1. | Auxin | 2. | Gibberellin |
| 3. | Cytokinin | 4. | Ethylene |
Subtopic: Auxin Function |
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Heterophylly in larkspur is demonstrated by:
| 1. | Leaves changing shape in response to water availability. |
| 2. | Leaves exhibiting different shapes at various stages of the plant's life cycle. |
| 3. | Leaves altering their color based on sunlight exposure. |
| 4. | Leaves varying in size depending on their position on the plant. |
Subtopic: Development |
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Phenotypic Plasticity in plant growth means:
| 1. | Plant roots are extensible |
| 2. | Plants do not respond to environmental condition around them |
| 3. | Stems can extend |
| 4. | Plants have the ability to produce different phenotypes in response to environmental changes |
Subtopic: Development |
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Apical dominance in plants, largely regulated by auxins, can be overcome by:
| 1. | IAA | 2. | Ethylene |
| 3. | Gibberellin | 4. | Cytokinin |
Subtopic: Cytokinin |
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How many statements regarding Ethylene are true?
1. 0
2. 1
3. 2
4. 3
| I: | It is synthesised in large amounts by tissues undergoing senescence and ripening fruits. |
| II: | It promotes senescence and abscission of plant organs especially of leaves and flowers. |
| III: | It enhances the respiration rate during ripening of the fruits. |
2. 1
3. 2
4. 3
Subtopic: Ethylene |
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Identify the correct statements:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Auxins, gibberellins and cytokinins are plant growth promoters. |
| II: | ABA is an inhibitor of plant growth activities. |
| III: | Ethylene is largely a plant growth promoter. |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
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The given picture shows ‘bolting’ in a plant with rosette habit. What PGR may be responsible for this?
1. ABA
2. GA3
3. IAA
4. Ethylene
1. ABA
2. GA3
3. IAA
4. Ethylene
Subtopic: Gibberellin |
90%
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