The phenomenon of heterophily:
1.
Is found in cotton, coriander, larkspur and buttercup
2.
Is an example of platicity
3.
Occurs as a result of development or in response to environment
4.
All are correct
Subtopic: Â Development |
 94%
From NCERT
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The intrinsic factor influencing the development in plants is:
| 1. | \(O_2\) |
| 2. | \(H_2O\) |
| 3. | \(CO_2\) and nutrition |
| 4. | Plant growth regulators |
Subtopic: Â Growth Hormones & Auxin |
 94%
From NCERT
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Match the columns:
| Column I | Column II | ||
| A. | Adenine derivative | (i) | Ethylene |
| B. | Terpenes | (ii) | Kinetin |
| C. | Gaseous hormone | (iii) | GA |
| D. | Caroteinoid derivative | (iv) | ABA |
| 1. | A = (i) , B =(ii) , C = (iii) , D= (iv) |
| 2. | A = (iv) , B =(iii) , C = (i) , D= (ii) |
| 3. | A = (ii) , B =(iii) , C = (iv) , D= (i) |
| 4. | A = (ii) , B =(iii) , C = (i) , D= (iv) |
Subtopic: Â Growth Hormones & Auxin |
 84%
From NCERT
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Charles Darwin and his son Francis Darwin found that coleoptile tip of a plant responded to unilateral light by growing towards the light source (photoperiodism). They worked with plant?
1. Phalaris (Canary grass)
2. Avena (Oat)
3. Saccharum
4. Triticale
1. Phalaris (Canary grass)
2. Avena (Oat)
3. Saccharum
4. Triticale
Subtopic: Â Growth Hormones & Auxin |
 78%
From NCERT
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Subtopic: Â Abscisic Acid |
 96%
From NCERT
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Subtopic: Â Growth Hormones & Auxin |Â Ethylene |
 85%
From NCERT
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Which of the following conclusions is supported by the research of both Went and Charles Darwin on shoot responses to light?
| 1. | When shoots are exposed to light, a chemical substance migrates towards the light. |
| 2. | Agar contains a chemical substance that mimics a plant hormone. |
| 3. | A chemical substance involved in shoot bending is produced in the shoot tips. |
| 4. | Once the shoot tip is cut, normal growth cannot be induced. |
Subtopic: Â Growth Hormones & Auxin |
 66%
From NCERT
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Match the columns:
| Column-I | Column-II | ||
| A. | Auxin | (i) | Chloroplast development |
| B. | Ethylene | (ii) | Fruit ripening |
| C. | GA | (iii) | Root initiation in stem cutting |
| D. | Cytokinin | (iv) | Breaking seed dormancy |
| 1. | A = (i) , B=(iv), C =(iii) , D= (ii) |
| 2. | A = (ii) , B=(iii), C =(i) , D= (iv) |
| 3. | A = (iii) , B=(ii), C =(iv) , D= (i) |
| 4. | A = (i) , B=(ii), C =(iii) , D= (iv) |
Subtopic: Â Growth Hormones & Auxin |Â Gibberellin |Â Cytokinin |Â Ethylene |
 89%
From NCERT
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Read the following statements:
How many of the above statements are correct?
1. Four
2. Five
3. Two
4. Three
| (i) | NAA and 2,4-D are synthetic auxins |
| (ii) | Auxins promote flowering in pineapples |
| (iii) | Auxins help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits |
| (iv) | Apical bud removal is applied for hedge making and creating bushy tea plants |
| (v) | Auxin induces parthenocarpy, like, in tomatoes |
How many of the above statements are correct?
1. Four
2. Five
3. Two
4. Three
Subtopic: Â Growth Hormones & Auxin |
 83%
From NCERT
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
The aleurone layer is stimulated to release ______________ and ______________ as a result of gibberellin release from the embryo of a seed:
1. Amylase; Protease
2. RNase; DNase
3. Proteins; Amino acids
4. Carbohydrates ; RNase
1. Amylase; Protease
2. RNase; DNase
3. Proteins; Amino acids
4. Carbohydrates ; RNase
Subtopic: Â Gibberellin |
 66%
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