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The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of:
1. NAA, 2, 4-D
2. GA3
3. Cytokinin
4. IAA, IBA

Subtopic:  Auxin Function |
From NCERT
NEET - 2013
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Assertion (A): Plants retain the capacity for unlimited growth throughout their life.
Reason (R): Plant growth is unique.
 
1. Both (A) and (R) are True and (R) correctly explains (A)
2. Both (A) and (R) are True but (R) does not correctly explains (A)
3. (A) is True but (R) is False
4. Both (A) and  (R) are False

Subtopic:  Growth |
 62%
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.
Subtopic:  Differentiation, Dedifferentiation and Redifferentiation |
 65%
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.
 76%
From NCERT
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Assertion (A): Growth is measured by a variety of parameters like an increase in fresh weight, dry weight, length, area, volume, and cell number.
Reason (R): These quantities are proportional to protoplasm.
 
1. Both (A) and (R) are True and (R) correctly explains (A)
2. Both (A) and (R) are True but (R) does not correctly explains (A)
3. (A) is True but (R) is False
4. Both (A) and  (R) are False
Subtopic:  Growth |
From NCERT
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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 |
 74%
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.
 86%
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 (A) 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) correctly explains (A)
2. Both (A) and (R) are True but (R) does not correctly explains (A)
3. (A) is True but (R) is False
4. Both (A) and  (R) are False

 
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.

 
Subtopic:  Abscisic Acid |
 82%
From NCERT
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