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Q. No.Consider the two statements:
Assertion (A):
The most widely used compound as source of ethylene is ethephon.
Reason (R):
Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly.
1.
Both (A) and (R) are True and (R) correctly explains the (A).
2.
Both (A) and (R) are True but (R) does not correctly explain the (A).
3.
(A) is True; (R) is False.
4.
(A) is False; (R) is True.
Subtopic: Ethylene |
82%
From NCERT
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Seed germination is inhibited by ABA in antagonism with:
1. Auxins
2. Ethylene
3. Kinetins
4. GAs
1. Auxins
2. Ethylene
3. Kinetins
4. GAs
Subtopic: Gibberellin | Abscisic Acid |
86%
From NCERT
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Rapid multiplication leads to ‐
1. Geometrical Progression
2. Natural selection
3. Suvival of fittest
4. Struggle for Existence
1. Geometrical Progression
2. Natural selection
3. Suvival of fittest
4. Struggle for Existence
Subtopic: Growth |
81%
From NCERT
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Given below are two statements
In light of the above statements, choose the correct answer from the options given below
| 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 |
| 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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