Cousins confirmed the release of a volatile substance from ripened oranges that

1.Hastened the ripening of already ripened bananas

2.Hastened the ripening of unripened banana

3.Slowed the ripening of unripened bananas

4.Slowed the ripening of oranges

Subtopic:  Ethylene |
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Auxin means

1.To escape

2.To slow

3.To grow

4.To fasten

Subtopic:  Growth Hormones & Auxin |
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Auxins was first isolated from

1.Human serum

2.Human urine

3.Human stool

4.Human saliva

Subtopic:  Growth Hormones & Auxin |
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Which of the following is not isolated from plants?

1.NAA

2.IAA3

3.IBA

4.GA3

Subtopic:  Growth Hormones & Auxin | Auxin Function |
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Auxins

Find the odd one.

1.Initiate rooting in stem cuttings

2.Promote flowering e.g. Pineapples

3.Prevent fruit and leaf drop at early stages

4.Prevent the abscission of older mature leaves and fruits

Subtopic:  Growth Hormones & Auxin | Auxin Function |
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In most higher plants, the growing apical bud inhibits the growth of …….. or axillary buds, a phenomenon called………….

1.Lateral, lateral Dominance

2.Lateral, Apical Dominance

3.Apical, Lateral Dominance

4.Apical, Apical Dominance

Subtopic:  Growth Hormones & Auxin | Auxin Function |
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For tea plantations, hedge-making, which of the following PGR is used?

1.Auxins

2.Cytokinins

3.GA3

4.ABA

Subtopic:  Growth Hormones & Auxin | Auxin Function |
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2,4-D widely used to

1.Kill dicot trees

2.Kill monocot weeds

3.Kill dicot weeds

4.Kill monocot shrubs

Subtopic:  Growth Hormones & Auxin |
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Which of the following is not a function performed by Auxin?

1.Controls Xylem differentiation

2.Helps in cell division and cell growth inhibition

3.Used as herbicide

4.Used to prepare weed free lawns by gardeners

Subtopic:  Growth Hormones & Auxin |
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Which of the following is not correct about Gibberellins?

1.Another kind of promotors PGR

2.There are more than 100 Gibberellins

3.Found in Fungi and higher plants

4.The first and most intensively studied form of Gibberellins is GA2

Subtopic:  Gibberellin |
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