It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

1. Cytokinin and Abscisic acid

2. Auxin and Ethylene

3. Gibberellin and Cytokinin

4. Gibberellin and Abscisic acid

Subtopic:  Auxin Function | Ethylene |
 79%
From NCERT
NEET - 2019
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What is the site of perception of photoperiod necessary for induction of flowering in plants?

1. Leaves

2. Lateral buds

3. Pulvinus

4. Shoot apex

Subtopic:  Photoperiodism (OLD NCERT) |
 85%
From NCERT
NEET - 2019
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The phytohormone which is supposed to be one of the factor responsible for regulating the opening and closing of stomata:

1. ABA

2. GA

3. IBA

4. Kinetin

Subtopic:  Abscisic Acid |
 90%
From NCERT
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When a plant is flooded it often increases its production of

1. cytokines

2. ethylene

3. gibberellins

4. all of the above

Subtopic:  Ethylene |
 51%
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The plant hormone, _______________ , plays a role in closing of stomata.

1. auxin

2. Cytokinin

3. gibberellin

4. ABA

Subtopic:  Abscisic Acid |
 92%
From NCERT
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Hormone inducing fruit ripening is:

1. cytokinin

2. Ethylene

3. abscissic acid

4. gibberellic acid

Subtopic:  Ethylene |
 91%
From NCERT
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Genetic dwarfism can be overcome by:

1. Gibberellin

2. ethylene

3. auxin

4. ABA

Subtopic:  Gibberellin |
 70%
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Which of the following properties is shown by cytokines?

1. Delay leaf senescence

2. Cause leaf abscission

3. Promote seed dormancy

4. Promote stomatal closing

Subtopic:  Cytokinin |
 76%
From NCERT
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Which of the following is not an auxin?

1.  IAA

2.  IBA

3.  Zeatin

4.  NAA

Subtopic:  Growth Hormones & Auxin | Cytokinin |
 92%
From NCERT
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Ethylene is related with:

1. Aerobic respiration

2. Climacteric phenomenon

3. Anaerobic respiration

4. Fermentation

Subtopic:  Ethylene |
 66%
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