Which of the following shapes will be required by the growth curve of a tree showing seasonal activity?
1. S-shape
2. Ladder shape
3. J-shape
4. Parabolic shape
Subtopic: Â Growth |
 73%
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On the first day of observation, leaf A shows 40 cm2 area and leaf B shows 50 cm2 area. On the following day, the area of leaf A becomes 44 cm2 and the area of leaf B becomes 55 cm2. Which of the following conclusions can be drawn about the growth rate of leaf A and B?
| 1. | The absolute growth rate is the same but the relative growth rate is different for A and B |
| 2. | The absolute growth rate is different but the relative growth rate is the same for A and B |
| 3. | Both absolute and relative growth rates are the same for A and B |
| 4. | Both absolute and relative growth rates are different for A and B |
Subtopic: Â Growth |
 61%
From NCERT
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The region at the distal end of the highly vacuolated cell in the root represents:
1. Zone of meristematic activity
2. Zone of elongation
3. Zone of maturation
4. Zone of differentiation
1. Zone of meristematic activity
2. Zone of elongation
3. Zone of maturation
4. Zone of differentiation
Subtopic: Â Growth |
From NCERT
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Which of the following growth parameter will be used to measure growth in an isobilateral leaf?
1. Increase in length
2. Increase in surface area
3. Increase in volume
4. Increase in cell number
1. Increase in length
2. Increase in surface area
3. Increase in volume
4. Increase in cell number
Subtopic: Â Growth |
 81%
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Which of the following growth parameters cannot be used to measure growth in watermelon?
1. Surface area
2. Fresh weight
3. Cell number
4. Amount of protoplasm
1. Surface area
2. Fresh weight
3. Cell number
4. Amount of protoplasm
Subtopic: Â Growth |
From NCERT
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Which of the following structures indicates the open form of growth in plants?
1. Root
2. Leaf
3. Flower
4. Cork cambium
1. Root
2. Leaf
3. Flower
4. Cork cambium
Subtopic: Â Growth |
 58%
From NCERT
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Which of the following pairs is chemically identical?
| 1. | Inhibitor-II and dormin |
| 2. | Dormin and terpenes |
| 3. | Carotenoids and kinetin |
| 4. | N6 - furfuryl amino purine and IAA |
Subtopic: Â Growth Hormones & Auxin |
 72%
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Select the incorrect match.
| 1. | Auxin | - Indole compound |
| 2. | Ethylene | - Adenine derivative |
| 3. | ABA | - Derivative of carotenoids |
| 4. | Gibberellic acid | - Composed of terpenes |
Subtopic: Â Growth Hormones & Auxin |
 87%
From NCERT
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Vernalisation is:
1. Low pH treatment
2. Low temperature treatment
3. High temperature treatment
4. High pH treatment
1. Low pH treatment
2. Low temperature treatment
3. High temperature treatment
4. High pH treatment
 88%
From NCERT
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Which one of the following generally acts as an antagonist to gibberellins?
1. Zeatin
2. Ethylene
3. ABA
4. IAA
1. Zeatin
2. Ethylene
3. ABA
4. IAA
Subtopic: Â Abscisic Acid |
 91%
From NCERT
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