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Q. No.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
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 |
88%
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 |
72%
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 |
75%
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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Select the plant growth inhibitor from the following.
1. Auxin
2. Gibberellin
3. ABA
4. Cytokinin
1. Auxin
2. Gibberellin
3. ABA
4. Cytokinin
Subtopic: Abscisic Acid |
92%
From NCERT
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Read the following and choose the incorrect statement.
1. Heterophylly w.r.t. habitat is observed in buttercup
2. GA is useful for obtaining early and quicker yield or economically important seeds
3. Kinetin does not occur naturally in plants
4. NM and 2, 4-D are natural auxins
1. Heterophylly w.r.t. habitat is observed in buttercup
2. GA is useful for obtaining early and quicker yield or economically important seeds
3. Kinetin does not occur naturally in plants
4. NM and 2, 4-D are natural auxins
Subtopic: Growth Hormones & Auxin |
84%
From NCERT
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Read the given statements and select the correct option.
Statement A : Auxin was first isolated from human urine as it does not have metabolic role in human body so it is excreted out.
Statement B : Cytokinins promote nutrient mobilization which helps in the delay of leaf senescence.
1. Both the statements are incorrect
2. Only statement B is incorrect
3. Both the statements are correct
4. Only statement A is incorrect
Statement A : Auxin was first isolated from human urine as it does not have metabolic role in human body so it is excreted out.
Statement B : Cytokinins promote nutrient mobilization which helps in the delay of leaf senescence.
1. Both the statements are incorrect
2. Only statement B is incorrect
3. Both the statements are correct
4. Only statement A is incorrect
Subtopic: Growth Hormones & Auxin | Cytokinin |
80%
From NCERT
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Consider the following statements and state True (T) or False (F).
A. Light, temperature and nutrition affect the plant growth.
B. Growth is an irreversible permanent increase in living organism.
C. In plants, meristems are the site of growth.
A. Light, temperature and nutrition affect the plant growth.
B. Growth is an irreversible permanent increase in living organism.
C. In plants, meristems are the site of growth.
| A | B | C | |
| 1. | T | T | F |
| 2. | F | T | T |
| 3. | T | F | T |
| 4. | T | T | T |
Subtopic: Growth |
81%
From NCERT
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Choose the option that correctly fills the blanks.
(a) ______ can help in shortening the period between germination and flowering.
(b) Most of the winter flowering plants are _____
(a) ______ can help in shortening the period between germination and flowering.
(b) Most of the winter flowering plants are _____
| (a) | (b) | |
| 1. | Photoperiodism | Short day plants |
| 2. | Vernalisation | Long day plants |
| 3. | Vernalisation | Short day plants |
| 4. | Photoperiodism | Long day plants |
Subtopic: Photoperiodism (OLD NCERT) | Vernalization (OLD NCERT) |
61%
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