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Q. No.What is vernalisation?
1. Flowering is induced only when plant is exposed to certain duration of photoperiod
2. Flowering is either quantitatively or qualitatively dependent on exposure to low-temperature
3. Presence of different kinds of structure in response to environment or phases of life
4. All changes that an organism goes through during its life cycle
Subtopic: Vernalization (OLD NCERT) |
83%
From NCERT
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Stimulus of low temperature in vernalisation is perceived by
1. Leaves
2. Embryo of the seed
3. Flower
4. Pericarp
1. Leaves
2. Embryo of the seed
3. Flower
4. Pericarp
Subtopic: Vernalization (OLD NCERT) |
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Which one of the following pairs is not correctly matched?
| 1. | Cytokinins | – | Richmond-Lang effect |
| 2. | ABA | – | Anti GA |
| 3. | 2,4-D | – | Natural auxin |
| 4. | Ethylene | – | Fruit ripening |
Subtopic: Growth Hormones & Auxin |
87%
From NCERT
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Find odd one from the given tissues developed by the process of de-differentiation.
1. lnterfascicular vascular cambium
2. Cork cambium
3. Secondary cortex
4. Wound cambium
1. lnterfascicular vascular cambium
2. Cork cambium
3. Secondary cortex
4. Wound cambium
Subtopic: Growth |
51%
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Mark the incorrect statement.
1. Most of the winter flowering plants are short-day plants
2. Wheat is a day-neutral plant
3. The site of perception of light is the leaves of plants during photoperiodism
4. Florigen migrates from leaves to shoot apices to induce flowering
1. Most of the winter flowering plants are short-day plants
2. Wheat is a day-neutral plant
3. The site of perception of light is the leaves of plants during photoperiodism
4. Florigen migrates from leaves to shoot apices to induce flowering
Subtopic: Photoperiodism (OLD NCERT) |
73%
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The method of softening and weakening of seed coat to break the dormancy by the treatment of acid or alcohol is called
1. Vernalization
2. Stratification
3. Scarification
4. Photoperiodism
1. Vernalization
2. Stratification
3. Scarification
4. Photoperiodism
Subtopic: Seed Dormancy (OLD NCERT) |
53%
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The given equation 'Lt = L0 + rt" is mathematical expression of
1. Geometrical growth
2. Arithmetic growth
3. Exponential growth
4. Logarithmic growth
1. Geometrical growth
2. Arithmetic growth
3. Exponential growth
4. Logarithmic growth
Subtopic: Growth | Growth Model |
89%
From NCERT
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In a given diagrammatic comparison, both leaves A and B have increased their area by 10 and 5 cm2 respectively in a given time. Calculate their absolute growth and relative growth rates.
| 1. | 10 | 100% | 5 | 20% |
| 2. | 20 | 100% | 30 | 20% |
| 3. | 10 | 50% | 5 | 10% |
| 4. | 20 | 50% | 30 | 10% |
Subtopic: Growth |
73%
From NCERT
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Which of the following is/are example(s) of dedifferentiated tissue?
1. Tracheary elements
2. Chlorenchyma
3. lnterfascicular cambium
4. Secondary xylem and phloem
1. Tracheary elements
2. Chlorenchyma
3. lnterfascicular cambium
4. Secondary xylem and phloem
Subtopic: Growth |
76%
From NCERT
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The ability of a plant to form different structures in response to environment or phases of life is called
1. Differentiation
2. Plasticity
3. Dormancy
4. Growth
1. Differentiation
2. Plasticity
3. Dormancy
4. Growth
Subtopic: Development |
94%
From NCERT
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