Which of the following is/are example(s) of dedifferentiated tissue?
1. Tracheary elements
2. Chlorenchyma
3. lnterfascicular cambium
4. Secondary xylem and phloem
Subtopic: Â Growth |
 77%
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: Â 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: Â Abscisic Acid |
 93%
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 |
Subtopic: Â Growth Hormones & Auxin |
 85%
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 |
Subtopic: Â Growth Hormones & Auxin |Â Cytokinin |
 83%
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: Â Growth |
 83%
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 |
 59%
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Which of the following phytohormones is responsible for ripening of fruits and increasing the number of female flowers in cucumbers?
| 1. | Auxin | 2. | Ethylene |
| 3. | Gibberellin | 4. | Cytokinin |
Subtopic: Â Ethylene |
 93%
From NCERT
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During vernalisation, the cold stimulus is perceived by
1. Young root apex
2. Mature stem apex
3. Young leaves
4. Mature buds Ver
1. Young root apex
2. Mature stem apex
3. Young leaves
4. Mature buds Ver
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Which of the following structures show unlimited growth in plants?
1. Leaves
2. Flowers
3. Fruits
4. Roots
Subtopic: Â Growth |
 77%
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