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Q. No.
Assertion:
2, 4-D is artificial auxin.
Reason:
2, 4-D is a weedicide and quickly kills mature monocots.
1.
Both assertion and reason are true and the reason is the correct explanation of the assertion.
2.
Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3.
Assertion is true but the reason is false.
4.
Both assertion and reason are false statements.
Subtopic: Auxin Function |
77%
From NCERT
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Match List I with List II:
Choose the correct answer from the options given below:
1. A - (III); B - (II); C - (I); D - (IV)
2. A - (II); B - (I); C - (IV); D - (III)
3. A - (III); B - (II); C - (IV); D - (I)
4. A - (I); B - (II); C - (III); D - (IV)
| List I | List II |
| A. Abscisic acid | I. Induce parthenocarpy |
| B. Gibberellin | II. Delay senescence |
| C. Auxin | III. Regulates dormancy |
| D. Ethylene | IV. Promotes root growth |
1. A - (III); B - (II); C - (I); D - (IV)
2. A - (II); B - (I); C - (IV); D - (III)
3. A - (III); B - (II); C - (IV); D - (I)
4. A - (I); B - (II); C - (III); D - (IV)
Subtopic: Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
75%
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Match List I with List II
Choose the correct answer from the option given below:
1. A-II, B-I, C-IV, D-III
2. A-IV, B-II, C-I, D-III
3. A-IV, B-III, C-I, D-II
4. A-III, B-IV, C-II, D-I
| List I | List II |
| A. Indole Acetic Acid | I. Increase length of grapes stalks |
| B. Zeatin | II. Hastens fruit ripening in tomatoes |
| C. Gibberellic acid | III. Overcome apical dominance |
| D. Ethephon | IV. Rooting in stem cuttings |
1. A-II, B-I, C-IV, D-III
2. A-IV, B-II, C-I, D-III
3. A-IV, B-III, C-I, D-II
4. A-III, B-IV, C-II, D-I
Subtopic: Auxin Function | Gibberellin | Ethylene |
88%
From NCERT
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Read the following statements:
(i) GA causes increase in length of grape stalks and causes apples to elongate and improve its shape
(ii) GA causes bolting in beet, cabbage and many plants with rosette habit
(iii) Kinetin is a modified cytosine
(iv) Cytokinins are abundant in root apices, developing shoot buds and young fruits
(v) Cytokinins cause lateral shoot growth and adventitious shoot formation
Which of the above statements are correct?
1. (i) , (ii) and (iii)
2. (ii) only
3. (iii) and (iv)
4. (i) , (ii) , (iv) and (v)
(i) GA causes increase in length of grape stalks and causes apples to elongate and improve its shape
(ii) GA causes bolting in beet, cabbage and many plants with rosette habit
(iii) Kinetin is a modified cytosine
(iv) Cytokinins are abundant in root apices, developing shoot buds and young fruits
(v) Cytokinins cause lateral shoot growth and adventitious shoot formation
Which of the above statements are correct?
1. (i) , (ii) and (iii)
2. (ii) only
3. (iii) and (iv)
4. (i) , (ii) , (iv) and (v)
Subtopic: Gibberellin | Cytokinin |
89%
From NCERT
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Read the following statements:
(i) NAA and 2,4-D are synthetic auxins
(ii) Auxins promote flowering in pineapples
(iii) Auxins help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits
(iv) Apical bud removal is applied for hedge making and creating bushy tea plants
(v) Auxin induces parthenocarpy, like, in tomatoes
How many of the above statements are correct?
1. Four
2. Five
3. Two
4. Three
(i) NAA and 2,4-D are synthetic auxins
(ii) Auxins promote flowering in pineapples
(iii) Auxins help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits
(iv) Apical bud removal is applied for hedge making and creating bushy tea plants
(v) Auxin induces parthenocarpy, like, in tomatoes
How many of the above statements are correct?
1. Four
2. Five
3. Two
4. Three
Subtopic: Growth Hormones & Auxin |
83%
From NCERT
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Assertion(A): Plants retain the capacity for unlimited growth throughout their life.
Reason(R): Plant growth is unique.
Choices for Assertions and reasons:
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): Plant growth is unique.
Choices for Assertions and reasons:
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 |
61%
From NCERT
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Assertion(A): Differentiation in plants is open.
Reason(R): The cells/tissues arising out of the same meristem have different structures at maturity.
Choices for Assertions and reasons:
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 cells/tissues arising out of the same meristem have different structures at maturity.
Choices for Assertions and reasons:
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: Differentiation, Dedifferentiation and Redifferentiation |
63%
From NCERT
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Assertion(A): Winter varieties of wheat are planted in autumn.
Reason(R): Winter varieties if planted in spring would normally fail to flower within a span of a flowering season.
Choices for Assertions and reasons:
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): Winter varieties if planted in spring would normally fail to flower within a span of a flowering season.
Choices for Assertions and reasons:
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: Vernalization (OLD NCERT) |
77%
From NCERT
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Assertion(A): r is the relative growth rate in plants but cannot be used to calculate efficiency index.
Reason(R): The final size of W1 depends on the initial size W0 during plant growth.
Choices for Assertions and reasons:
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 final size of W1 depends on the initial size W0 during plant growth.
Choices for Assertions and reasons:
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 |
67%
From NCERT
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Assertion(A): Flowering in certain plants depends on the relative durations of light and dark periods.
Reason(R): Flowering in LDP needs only the duration of light period.
Choices for Assertions and reasons:
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): Flowering in LDP needs only the duration of light period.
Choices for Assertions and reasons:
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: Photoperiodism (OLD NCERT) |
70%
From NCERT
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