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Q. No.Which of the following elements for growth directly aids in increasing the plant size?
1. Temperature
2. Gravity
3. Water
4. Light
1. Temperature
2. Gravity
3. Water
4. Light
Subtopic: Â Growth |
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Level 3: 35%-60%
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Intracellular factors involved in the control of growth and development in plants will be:
1. Chemicals such as plant growth regulators
2. Physical factors like light temperature and oxygen.
3. Water
4. Genetic factors
1. Chemicals such as plant growth regulators
2. Physical factors like light temperature and oxygen.
3. Water
4. Genetic factors
Subtopic: Â Growth |Â Growth Model |Â Growth Terminology |Â Development |
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Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | Plant growth is intimately linked to the water status of the plant while development is not. |
| Reason (R): | The plant cells grow in size by cell enlargement which in turn requires water. |
| 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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Level 3: 35%-60%
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Consider the given two statements:
Which of the following is correct?
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
| Statement I: | Differentiation in plant cells is an irreversible process, under normal condition, where cells acquire specific structures to perform specialized functions. |
| Statement II: | Dedifferentiation in plants occurs when previously differentiated cells regain the capacity to divide under certain conditions, forming meristematic tissues like cork cambium. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Â Growth |Â Differentiation, Dedifferentiation and Redifferentiation |
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Level 2: 60%+
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Which of the following correctly pairs the process with an example?
| A. | Differentiation | - | The formation of xylem and phloem from meristematic tissue |
| B. | Dedifferentiation | - | Formation of secondary xylem |
| 1. | Only A is correct |
| 2. | Only B is correct |
| 3. | Both A and B are correct |
| 4. | Neither A nor B is correct |
Subtopic: Â Differentiation, Dedifferentiation and Redifferentiation |
 52%
Level 3: 35%-60%
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Redifferentiation in plants refers to:
| 1. | Meristematic cells developing into specialized tissues. |
| 2. | Xylem cells undergoing dedifferentiation to form cambium. |
| 3. | Fully mature tissues losing their ability to perform specialized functions. |
| 4. | Differentiated cells regaining the ability to divide and specialize again. |
Subtopic: Â Differentiation, Dedifferentiation and Redifferentiation |
 53%
Level 3: 35%-60%
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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: Â Differentiation, Dedifferentiation and Redifferentiation |
 59%
Level 3: 35%-60%
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Consider the given two statements:
| Statement I: | In cotton, coriander, and larkspur, differences in the shapes of leaves produced in air and those produced in water represent heterophyllous development due to environment. |
| Statement II: | In buttercup, the leaves of the juvenile plant are different in shape from those in mature plants. |
| 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 Development |
 56%
Level 3: 35%-60%
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Spraying sugarcane crops with gibberellins increase the yield by as much as 20 tonnes per acre. |
| Reason (R): | Sugarcane stores carbohydrates such as sugar in their stems. |
| 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. | Both (A) and (R) are False. |
Subtopic: Â Gibberellin |
Level 3: 35%-60%
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In most seeds, the ratio of which of the following pair of PGRs determines whether the embryo remains dormant or germinates?
| 1. | ABA and GA | 2. | Auxin and Cytokinin |
| 3. | Auxin and GA | 4. | ABA and Cytokinin |
Subtopic: Â Gibberellin |Â Abscisic Acid |
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Level 2: 60%+
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