ABA acts as antagonistic to

1. ethylene 2. cytokinin
3. gibberellic acid 4. IAA

Subtopic:  Abscisic Acid |
 89%
From NCERT
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Monocarpic plants are those which

1. bear flowers with one ovary

2. flower once and die

3. bear only one flower

4. All of these

 

Subtopic:  Vernalization (OLD NCERT) |
 56%
From NCERT
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The photoperiod in plants is perceived at

1. meristem

2. flower

3. floral buds

4. leaves

Subtopic:  Photoperiodism (OLD NCERT) |
 89%
From NCERT
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Interfascicular cambium and cork cambium are formed due to
1. Cell division
2. Cell differentitation
3. Cell dedifferentiation
4. Redifferentiation

Subtopic:  Differentiation, Dedifferentiation and Redifferentiation |
 87%
From NCERT
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To increase sugar production in sugarcanes, they are sprayed with

1. IAA

2. cytokinin

3. gibberellin

4. ethylene

Subtopic:  Gibberellin |
 95%
From NCERT
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Plasticity in plant growth means that

1. plant roots are extensible

2. plant development is dependent on the environment

3. stems can extend

4. None of the above

Subtopic:  Development |
 90%
From NCERT
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Growth can be measured in various ways. Which of these can be used as parameters to measure growth?

1. increase in cell number

2. increase in cell size

3. increase in length and weight

4. All of these

Subtopic:  Growth |
 97%
From NCERT
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Apples are generally wrapped in waxed paper to

1. prevent sunlight for changing its colour
2. prevent aerobic respiration by checking the entry of oxygen
3. prevent ethylene formation due to injury
4. makes the apples look attractive

Subtopic:  Aerobic Respiration |
 59%
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The term synergistic action of hormones refers to

1. When two hormones act together but bring about opposite effects.
2. When two Hormones act together and contribute to the same function.
3. When one Hormone affects more than one function
4. When many hormones bring about anyone function

Subtopic:  Abscisic Acid |
 80%
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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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