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Q. No.Dormancy in seeds may be due to presence of certain chemicals like
1. Phenolic acid
2. Zeatin
3. NM
4. Amylase
Subtopic: Seed Dormancy (OLD NCERT) |
68%
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Viviparous type of seed germination is found in
1. Sonneratia
2. Rhizophora
3. Oryza sativa
4. Both (1) & (2)
1. Sonneratia
2. Rhizophora
3. Oryza sativa
4. Both (1) & (2)
Subtopic: Seed Dormancy (OLD NCERT) |
72%
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What is meant by vivipary in plants?
1. Seed germination with subterranean cotyledons
2. Seed germination with epiterranean cotyledons
3. Fruit development without pollination
4. Seed germination inside fruit, while the fruit is still attached to plant
1. Seed germination with subterranean cotyledons
2. Seed germination with epiterranean cotyledons
3. Fruit development without pollination
4. Seed germination inside fruit, while the fruit is still attached to plant
Subtopic: Seed Dormancy (OLD NCERT) |
61%
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Which of the following plants do not show any correlation between exposure to light duration and induction of flowering response?
1. Long-day plant
2. Day-neutral plant
3. Short day plant
4. All of these
2. Day-neutral plant
3. Short day plant
4. All of these
Subtopic: Photoperiodism (OLD NCERT) |
81%
From NCERT
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Which of the following pair is incorrectly matched?
1. Tomato - Day-neutral plant
2. Wheat - Short day plant
3. Henbane - Long day plant
4. Sugarcane - Short-day plant
1. Tomato - Day-neutral plant
2. Wheat - Short day plant
3. Henbane - Long day plant
4. Sugarcane - Short-day plant
Subtopic: Photoperiodism (OLD NCERT) |
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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
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 |
86%
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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