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 |
 93%
Level 1: 80%+
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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 |
 85%
Level 1: 80%+
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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%
Level 2: 60%+
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Subtopic: Â Abscisic Acid |
 96%
Level 1: 80%+
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Subtopic: Â Growth Hormones & Auxin |Â Ethylene |
 85%
Level 1: 80%+
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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 |
 67%
Level 2: 60%+
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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 |
 90%
Level 1: 80%+
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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%
Level 1: 80%+
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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 |
 68%
Level 2: 60%+
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Which of the following plant growth responses is primarily due to the action of auxins?
1. Cell elongation
2. Leaf abscission
3. Cell division
4. Fruit development
1. Cell elongation
2. Leaf abscission
3. Cell division
4. Fruit development
Subtopic: Â Auxin Function |
Level 3: 35%-60%
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