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Q. No.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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"Cabbages are subjected to chilling treatment". Which of the following effects will be imparted on the cabbages?
1. Induce seed dormancy
2. Break seed dormancy
3. Induce photoperiodic flowering
4. Induce growth
1. Induce seed dormancy
2. Break seed dormancy
3. Induce photoperiodic flowering
4. Induce growth
Subtopic: Vernalization (OLD NCERT) |
From NCERT
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What is the reason for sowing winter varieties of rye in autumn?
| 1. | It will provide ambient temperature for the growth and development of plants. |
| 2. | It will induce flowering in one season and death in the second season. |
| 3. | It will induce seed dormancy due to endogenous control. |
| 4. | It will increase the photoperiod requirement of rye flowers. |
Subtopic: Vernalization (OLD NCERT) |
52%
From NCERT
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Statement A: Different plants have a different critical duration of light.
Statement B: Day-neutral plants require light exposure equal to critical duration, to induce flowering in them.
1. Only statement A is correct
2. Only statement B is correct
3. Both statements are correct
4. Both statements are incorrect
Statement B: Day-neutral plants require light exposure equal to critical duration, to induce flowering in them.
1. Only statement A is correct
2. Only statement B is correct
3. Both statements are correct
4. Both statements are incorrect
Subtopic: Photoperiodism (OLD NCERT) |
64%
From NCERT
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In which of the following plants, the hypothetical hormone responsible for flowering due to light exposure translocates from leaves to shoot apices to induce flowering?
1. Sugarbeet
2. Tomato
3. Pepper
4. Cucumber
1. Sugarbeet
2. Tomato
3. Pepper
4. Cucumber
Subtopic: Photoperiodism (OLD NCERT) | Vernalization (OLD NCERT) |
57%
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Plant growth is a cumulative effect of:
1. Only genomic control
2. Only intrinsic controls
3. Only extrinsic controls
4. Both extrinsic and intrinsic control
1. Only genomic control
2. Only intrinsic controls
3. Only extrinsic controls
4. Both extrinsic and intrinsic control
Subtopic: Growth |
93%
From NCERT
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