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Q. No.
Assertion(A): ABA is one of the most widely used PGRs in agriculture.
Reason(R): Ethylene regulates many physiological processes.
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: Ethylene | Abscisic Acid |
73%
From NCERT
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Assertion(A): The development of plants could be flexible.
Reason(R): Differentiation in plants is closed.
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.
Reason(R): Differentiation in plants is closed.
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: Seed Dormancy (OLD NCERT) |
85%
From NCERT
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Assertion(A): Expansion of leaf is growth.
Reason(R): Growth is reversible permanent increase in size of an organ or its parts.
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.
Reason(R): Growth is reversible permanent increase in size of an organ or its parts.
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: Growth |
83%
From NCERT
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Assertion(A): Growth, at an organ level, is principally a consequence of the increase in the amount of protoplasm.
Reason(R): The increase in protoplasm is difficult to measure directly.
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.
Reason(R): The increase in protoplasm is difficult to measure directly.
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: Growth |
From NCERT
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Assertion(A): ABA is called stress hormones.
Reason(R): ABA stimulates the opening of the stomata.
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.
Reason(R): ABA stimulates the opening of the stomata.
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: Abscisic Acid |
82%
From NCERT
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Assertion (A): In an organism anabolism and catabolism take place simultaneously.
Reason (R): Senescence occurs when there is an increase in the rate of anabolism with respect to catabolism.
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.
Reason (R): Senescence occurs when there is an increase in the rate of anabolism with respect to catabolism.
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 | Development |
55%
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Which of the following plant parts perceives the photoperiod in plants?
1. meristem
2. flower
3. floral buds
4. leaves
1. meristem
2. flower
3. floral buds
4. leaves
Subtopic: Photoperiodism (OLD NCERT) |
85%
From NCERT
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Apical dominance in plants can be overcome by the application of the PGR:
1. Cytokinin
2. Ethylene
3. ABA
4. Gibberellins
1. Cytokinin
2. Ethylene
3. ABA
4. Gibberellins
Subtopic: Cytokinin |
85%
From NCERT
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Spraying sugarcane crops with which of the following plant growth regulators increases the stem's length, thus increasing the yield by as much as 20 tonnes per acre?
1. Auxins
2. Gibberellins
3. Cytokinins
4. ABA
1. Auxins
2. Gibberellins
3. Cytokinins
4. ABA
Subtopic: Auxin Function |
90%
From NCERT
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In plants:
I: Growth is open
II: Differentiation is open
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: Growth is open
II: Differentiation is open
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Growth |
76%
From NCERT
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