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Q. No.The site of perception of light in plants for flowering is
1. Stems
2. Roots
3. Leaves
4. Fruits
Subtopic: Photoperiodism (OLD NCERT) |
88%
From NCERT
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The hormonal substance which migrates from leaves to shoot apices to induce flowering is
1. Dormin
2. Zeatin
3. Kinetin
4. Florigen
1. Dormin
2. Zeatin
3. Kinetin
4. Florigen
Subtopic: Growth Hormones & Auxin |
57%
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Some plants like sugarbeet and cabbage require low temperatures for flowering. This phenomenon is called
1. Photoperiodism
2. Parthenocarpy
3. Vemalisation
4. Abscission
1. Photoperiodism
2. Parthenocarpy
3. Vemalisation
4. Abscission
Subtopic: Vernalization (OLD NCERT) |
84%
From NCERT
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Which of the following is incorrect about vernalisation?
1. It prevents precocious reproductive development
2. It is observed in winter variety of wheat
3. Flowering is stimulated by low temperature
4. It is the resting stage of seeds
1. It prevents precocious reproductive development
2. It is observed in winter variety of wheat
3. Flowering is stimulated by low temperature
4. It is the resting stage of seeds
Subtopic: Vernalization (OLD NCERT) |
66%
From NCERT
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During vernalisation, the stimulus of low temperature is perceived by
1. Stem apex
2. Leaves
3. Roots
4. Bark
1. Stem apex
2. Leaves
3. Roots
4. Bark
Subtopic: Vernalization (OLD NCERT) |
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Growth in plant organs is
1. Qualitative and extrinsic
2. Quantitative and intrinsic
3. Qualitative and intrinsic
4. Quantitative and extrinsic
1. Qualitative and extrinsic
2. Quantitative and intrinsic
3. Qualitative and intrinsic
4. Quantitative and extrinsic
Subtopic: Growth |
54%
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The growth in plants differs from growth in animals in
1. Being localized and indefinite
2. Being indefinite
3. Having indefinite lifespan
4. Having definite lifespan
1. Being localized and indefinite
2. Being indefinite
3. Having indefinite lifespan
4. Having definite lifespan
Subtopic: Growth |
52%
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Find odd one w.r.t. differentiation
1. Loss of nucleus in sieve
2. Death of protoplasm in tracheary elements
3. Callus formation
4, Lignification in vessels
1. Loss of nucleus in sieve
2. Death of protoplasm in tracheary elements
3. Callus formation
4, Lignification in vessels
Subtopic: Growth | Growth Hormones & Auxin |
59%
From NCERT
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Larkspur, Ranunculus and cotton plants are similar in the presence of
1. Developmental heterophylly
2. Plasticity
3. Environmental heterophylly
4. Homospory
1. Developmental heterophylly
2. Plasticity
3. Environmental heterophylly
4. Homospory
Subtopic: Growth |
61%
From NCERT
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The direction of the transport of auxins is
1. Polar in basipetal
2. Polar in acropetal
3. Through xylem
4. Through phloem
1. Polar in basipetal
2. Polar in acropetal
3. Through xylem
4. Through phloem
Subtopic: Growth Hormones & Auxin |
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