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Q. No.Given below are two statements
Statement I:
Flowering in some plants depends on the relative duration of light and dark exposure
Statement II:
Some plants require the exposure of light for a period exceeding a well‐defined critical duration and are called long‐day plants
In light of the above statements, choose the correct answer from the options given below
1.
Both Statement I and Statement II are true
2.
Both Statement I and Statement II are false
3.
Statement I is true but Statement II is false
4.
Statement I is false but Statement II is true
Subtopic: Photoperiodism (OLD NCERT) |
86%
From NCERT
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Match List I with List II
Choose the correct answer from the options given below:
1. A ‐ IV , B ‐ III , C ‐ II , D ‐ I
2. A ‐ III , B ‐ IV , C ‐ I , D ‐ II
3. A ‐ IV , B ‐ III , C ‐ I , D ‐ II
4. A ‐ III , B ‐ IV , C ‐ II , D ‐ I
| List I | List II | ||
| A. | IAA | I. | Bolting |
| B. | ABA | II. | Ripening of Fruits |
| C. | GA | III. | Weed Free Lawns |
| D. | Ethylene | IV. | Stomatal Closure |
1. A ‐ IV , B ‐ III , C ‐ II , D ‐ I
2. A ‐ III , B ‐ IV , C ‐ I , D ‐ II
3. A ‐ IV , B ‐ III , C ‐ I , D ‐ II
4. A ‐ III , B ‐ IV , C ‐ II , D ‐ I
Subtopic: Auxin Function | Gibberellin | Ethylene | Abscisic Acid |
82%
From NCERT
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Which of the following statements for plant growth is incorrect?
1. It is localised
2. It is open ended
3. It is indeterminate
4. It does not involve increase in number of parts
1. It is localised
2. It is open ended
3. It is indeterminate
4. It does not involve increase in number of parts
Subtopic: Growth |
77%
From NCERT
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Optimum temperature required for the proper growth in most of the plants is
1. 30-45°C
2. 10-20°C
3. 28-30°C
4. 0-10°C
1. 30-45°C
2. 10-20°C
3. 28-30°C
4. 0-10°C
Subtopic: Growth |
57%
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Find odd one w.r.t. tissues developed by the process of redifferentiation
1. Secondary cortex
2. Secondary xylem
3. Phellem
4. Phellogen
1. Secondary cortex
2. Secondary xylem
3. Phellem
4. Phellogen
Subtopic: Growth |
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Which of the given plant shows plasticity in response to its prevailing environment?
1. Larkspur
2. Buttercup
3. Cotton
4. Coriander
1. Larkspur
2. Buttercup
3. Cotton
4. Coriander
Subtopic: Development |
86%
From NCERT
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Who performed the experiments using canary grass to demonstrate the curvature of tip?
1. E. Kurosawa
2. F. Skoog
3. Went
4. Darwin
1. E. Kurosawa
2. F. Skoog
3. Went
4. Darwin
Subtopic: Growth Hormones & Auxin |
75%
From NCERT
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Subtopic: Growth Hormones & Auxin |
75%
From NCERT
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During differentiation of xylem
1. End walls are lost in tracheids
2. Loss of protoplasm occurs in vessels
3. Lignified thickening develops in tracheary elements
4. More than one option is correct
1. End walls are lost in tracheids
2. Loss of protoplasm occurs in vessels
3. Lignified thickening develops in tracheary elements
4. More than one option is correct
Subtopic: Auxin Function |
79%
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2, 4-D is
1. Widely used to kill monocots
2. Effective weedicides against broad-leaved plants
3. Used to prevent lodging and root initiation
4. Used to promote flowering in pineapple and mango
1. Widely used to kill monocots
2. Effective weedicides against broad-leaved plants
3. Used to prevent lodging and root initiation
4. Used to promote flowering in pineapple and mango
Subtopic: Growth Hormones & Auxin |
75%
From NCERT
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