Apical dominance is due to high concentration of:

1.  auxin in terminal bud

2.  Gibberellins in apical bud

3.  Auxin in lateral bud

4.  Auxin and gibberellins in lateral bud

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4
Correct Answer :

auxin in terminal bud


Explanation :
No Explanation available for this question

Regulation of flowering by length of day and night is:

1.  Phototropism

2.  Photoperiodism

3.  Nyctinasty

4.  None of above

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4
Correct Answer :

Photoperiodism


Explanation :
No Explanation available for this question

Pruning of plants promotes branching due to sensitization of axillary buds by:

1.  Ethylene

2.  Cytokinin

3.  Gibberellins

4.  IAA

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4
Correct Answer :

IAA


Explanation :
No Explanation available for this question

One set of plants was grown at 12 hours day and 12 hours night period cycles and it flowered while in other set night phase was interrupted by flash of light and it did not produce flower. Under which one of following categories will you place this plant

1.  Long day plant

2.  Day neutral plant

3.  Short day plant

4.  Darkness neutral plant

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4
Correct Answer :

Short day plant


Explanation :
No Explanation available for this question

Cell elongation in intermodal regions of green plants takes place due to:

1.  Cytokinin

2.  Gibberellin

3.  Indoleacetic acid

4.  Ethylene

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4
Correct Answer :

Gibberellin


Explanation :
No Explanation available for this question

Senescence is inhibited by:

1.  Ethylene

2.  Gibberllic acid

3.  Abscisic acid

4.  Cytokinin

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4
Correct Answer :

Cytokinin


Explanation :
No Explanation available for this question

To test any chemical substance by using living system is called

1.  Grafting

2.  Cloning

3.  Biopsy

4.  Bioassay

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4
Correct Answer :

Bioassay


Explanation :
No Explanation available for this question

Which hormone is maximum in coconut milk

1.  Gibberellins

2.  Ethylene

3.  Cytokinin

4.   Auxin

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4
Correct Answer :

Cytokinin


Explanation :
No Explanation available for this question

Gibberllins can promote seed germination because of their influence on

1.  Rate of cell division

2.  Production of hydrolyzing enzymes

3.  Synthesis of abscisic acid

4.  Absorption of water through hard seed coat

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4
Correct Answer :

Production of hydrolyzing enzymes


Explanation :
No Explanation available for this question

Avena curvature test is a bioassay for examining the activity of:

1.  Auxins

2.  Gibberellins

3.  Cytokinins

4.  Ethylene

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4
Correct Answer :

Auxins


Explanation :
No Explanation available for this question
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