Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 

Assertion (A):	Spraying cereal fields with 2,4-D eliminates monocot weeds.
Reason (R):	Dicots can rapidly inactivate synthetic auxins.

In the light of the above statements choose the correct answer from the options given below:
 

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.

Assertion: If leaves removed from a plant are dipped in a cytokinin solution, they stay green much longer than otherwise:
Reason: Cytokinins have an anti-aging effect of certain plant organs like leaves.

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 reason is false.
4. Both assertion and reason are false

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 

In the light of the above statements choose the correct answer from the options given below:
 

Assertion: Cytokinins have also been used against plants by certain pathogens like Agrobacterium tumefaciens.
Reason: Coevolution does not always work to the plant’s advantage.

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 reason is false.
4. Both assertion and reason are false

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 

In the light of the above statements choose the correct answer from the options given below:
 

Assertion: Some seeds that normally require certain environmental conditions to germinate, break dormancy if they are treated with gibberellins.
Reason: Gibberellins stimulate the synthesis of digestive enzymes that mobilize stored nutrients

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 reason is false.
4. Both assertion and reason are false

Assertion: The levels of ABA may increase 100-fold during seed maturation.
Reason: The high levels of ABA in maturing seeds inhibit germination.

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 reason is false.
4. Both assertion and reason are false

Assertion: Apples are generally stored in bins flushed with carbon dioxide.
Reason: A burst of ethylene production in fruits triggers the ripening process.

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 reason is false.
4. Both assertion and reason are false

Assertion: In cocklebur [Xanthium strumarium], interruption of the light portion of the photoperiod by a brief exposure of darkness inhibits flowering.
Reason: The cocklebur plant is responsive to day length for induction of flowering.

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 reason is false.
4. Both assertion and reason are false

Assertion: Unlike plants like mangroves, plants less specialized to cope with oxygen deprivation in water logged soils, respond by producing ethylene.
Reason: Ethylene promotes cynaobacterial growth in the surrounding water that increases its oxygen content.

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 reason is false.
4. Both assertion and reason are false