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Q. No.
Given below are two statements:
Assertion (A):
Spraying juvenile conifers with GAs hastens the maturity period.
Reason (R):
GAs lead to early seed production in conifers.
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: Gibberellin |
80%
From NCERT
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Given below are two statements:
| Assertion (A): | Ethylene helps the plants to increase their absorption surface. |
| Reason (R): | Ethylene promotes root growth and root hair formation. |
| 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: Ethylene |
82%
From NCERT
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Given below are two statements:
| Assertion (A): | Ethylene is one of the most widely used PGR in agriculture. |
| Reason (R): | Ethylene regulates many physiological processes of plants. |
| 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: Ethylene |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | Winter varieties are planted in autumn. |
| Reason (R): | Winter varieties, if planted in spring, they normally fail to flower or to produce mature grain within a span of a flowering season. |
| 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: Vernalization (OLD NCERT) |
84%
From NCERT
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Given below are two statements:
| Assertion (A): | Development in plants is considered the sum of growth and differentiation. |
| Reason (R): | Development in plants is under the control of intrinsic factors only. |
| 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: Growth |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | Auxins have been used extensively in agricultural and horticultural practices. |
| Reason (R): | GA3 accelerates the yield of malt from barley grains. |
| 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: Growth Hormones & Auxin | Gibberellin |
81%
From NCERT
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Given below are two statements:
| Assertion (A): | Plant exhibits plasticity in development. |
| Reason (R): | Plants follow different pathways in response to the environment or phases of life to form different kinds of structures. |
| 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: Development | Seed Dormancy (OLD NCERT) |
83%
From NCERT
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Given below are two statements:
| Assertion (A): | Ethylene helps to increase the number of fruits in cucumber. |
| Reason (R): | Ethylene promotes the production of both male and female flowers on the same tree. |
| 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: Ethylene |
68%
From NCERT
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There are certain seeds that fail to germinate even when external conditions are favorable. Dormancy in the seed is a biological mechanism that provides protection against it.
1. Seed spoilage
2. Pre-mature germination
3. Embryo abortion
4. Dehydration
1. Seed spoilage
2. Pre-mature germination
3. Embryo abortion
4. Dehydration
Subtopic: Seed Dormancy (OLD NCERT) |
55%
From NCERT
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| Statement A: | Vernalization can be employed to overcome seed dormancy. |
| Statement B: | Microbial action is an artificial method to create mechanical abrasions in the seed coat. |
1. Only statement A is correct
2. Only statement B is correct
3. Both statements A and B are correct
4. Both statements A and B are incorrect
Subtopic: Vernalization (OLD NCERT) | Seed Dormancy (OLD NCERT) |
From NCERT
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