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 |
 76%
From NCERT
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Assertion (A) : Ethylene helps the plants to increase their absorption surface.
Reason (R) : It promotes root growth and root hair formation. 

1. Both (A) and reason are true and (R) is the correct explanation of (A)
2. Both (A) assertion 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 statements

Subtopic:  Ethylene |
 82%
From NCERT
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A : Breaking of seed dormancy by giving cold treatment to seedling in presence of air is vernalisation. 

B : Vernalisation increases vegetative growth period to bring early flowering. 

1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1).

2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3. If Assertion is true statement but reason is false, then mark (3).

4. If both Assertion and Reason are false statements, then mark (4).

Subtopic:  Vernalization (OLD NCERT) |
From NCERT
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A : Ethephon hastens fruit ripening in tomatoes.

R : Ethephon releases ethylene readily.

1 If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1).

2 If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3 If Assertion is true statement but reason is false, then mark (3).

4 If both Assertion and Reason are false statements, then mark (4).

Subtopic:  Ethylene |
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A: In coriander, the leaves of juvenile plants are different in shape from those in mature plants.

R: It shows environmental plasticity.

1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1).

2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3. If Assertion is a true statement but the reason is false, then mark (3).

4. If both Assertion and Reason are false statements, then mark (4).

Subtopic:  Development |
From NCERT
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Assertion (A) : Promotion of flowering by a period of low temperature is called vernalisation.
Reason (R) : Vernalisation prevents precocious reproductive development.

1. Both (A) and reason are true and (R) is the correct explanation of (A)
2. Both (A) assertion 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 statements

Subtopic:  Vernalization (OLD NCERT) |
 51%
From NCERT
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A: 2,4-D is widely used as an herbicide.

R: It is used to kill mature monocotyledonous plants.

1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1).

2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3. If Assertion is a true statement but the reason is false, then mark (3).

4. If both Assertion and Reason are false statements, then mark (4).

Subtopic:  Auxin Function |
 81%
From NCERT
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Match the Following:

Column I

Column II

A. IAA

B. ABA

C. Ethylene

D. GA

E. Cytokinin

1. Herring sperm DNA.

2. Bolting

3. Stomatal closure

4. Weed-free lawns

5. Ripening of fruits.

Codes
 

Options:  A   B   C   D   E 
1. 4 3 5 2 1
2. 5 3 4 2 1
3. 4 1 4 3 2
4. 5 3 2 4

 

Subtopic:  Auxin Function | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
 93%
From NCERT
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Which one of the following pairs, is not correctly matched?

1. IAA – Cell wall elongation

2. Abscissic acid – Stomatal closure

3. Gibberellic acid – Leaf fall

4. Cytokinin – Cell division

Subtopic:  Gibberellin | Ethylene |
 81%
From NCERT
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Which one of the following pairs, is not correctly matched?
1. Abscisic acid - Stomatal closure
2. Gibberellic acid - Leaf fall
3. Cytokinin - Cell division
4. IAA - Cell wall elongation

Subtopic:  Gibberellin |
 95%
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