Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
1. Gibberellic acid
2. Nitrate
3. Ascorbic acid
4. Chilling conditions

Subtopic:  Seed Dormancy (OLD NCERT) |
 57%
From NCERT
NEET - 2020
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Match the following concerning the activity/function and the phytohormone involved:

Column I Column II
(a) Fruit ripener      (i) Abscisic acid
(b) Herbicide (ii) GA 3
(c) Bolting agent    (iii) 2, 4-D
(d) Stress hormone (iv) Ethephon


Select the correct option from following:

Options: (a) (b) (c) (d)
1. (ii) (iii) (iv) (i)
2. (iii) (iv) (ii) (i)
3. (iv) (iii) (ii) (i)
4. (iv) (ii) (i) (iii)

Subtopic:  Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
 85%
From NCERT
NEET - 2020
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Who coined the term 'Kinetin'?

1. Skoog and Miller

2. Darwin

3. Went

4. Kurosawa

Subtopic:  Growth Hormones & Auxin |
 83%
From NCERT
NEET - 2020
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The plant hormone used to destroy weeds in a field is:
1. 2, 4-D
2. IBA
3. IAA
4. NAA

Subtopic:  Auxin Function |
 88%
From NCERT
NEET - 2021
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Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

1. Plasticity 2. Maturity
3. Elasticity 4. Flexibility
Subtopic:  Development |
 89%
From NCERT
NEET - 2021
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The site of perception of light in plants during photoperiodism is:

1. Axillary bud

2. Leaf

3. Shoot apex

4. Stem

Subtopic:  Photoperiodism (OLD NCERT) |
 79%
From NCERT
NEET - 2021
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Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

1. Gibberellin

2. Ethylene

3. Abscisic acid

4. Cytokinin

Subtopic:  Gibberellin |
 87%
From NCERT
NEET - 2020
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Which of the following is not an inhibitory substance governing seed dormancy?

1. Abscisic acid

2. Phenolic acid

3. Para-ascorbic acid

4. Gibberellic acid

Subtopic:  Seed Dormancy (OLD NCERT) |
 78%
From NCERT
NEET - 2020
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Which one of the following plants does not show plasticity?
1. Maize 
2. Cotton 
3. Coriander 
4. Buttercup
Subtopic:  Development |
 83%
From NCERT
NEET - 2022
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The gaseous plant growth regulator is used in plants to:
1. kill dicotyledonous weeds in the fields
2. speed up the malting process
3. promote root growth and root hair formation to increase the absorption surface
4. help overcome apical dominance
Subtopic:  Ethylene |
 73%
From NCERT
NEET - 2022
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