Select Chapter Topics:
Q. No.Which of the following is not formed as result of re-differentiation in plants?
1. Cork cambium
2. Phellem
3. Periderm
4. Secondary xylem
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
66%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The examples of de-differentiation in plants include:
| I: | Formation of a tumour. |
| II: | Parenchyma cells made to divide under controlled laboratory conditions during plant tissue culture. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Growth Terminology | Development | Differentiation, Dedifferentiation and Redifferentiation |
64%
Please attempt this question first.
Hints
Consider the given two statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
| Statement I: | In cotton, coriander, and larkspur, differences in the shapes of leaves produced in air and those produced in water represent heterophyllous development due to environment. |
| Statement II: | In buttercup, the leaves of the juvenile plant are different in shape from those in mature plants. |
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
Subtopic: Development |
57%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Auxin was isolated from tips of coleoptiles of oat seedlings by:
1. Charles Darwin
2. F. W. Went
3. Boysen and Jensen
4. Francis Darwin
1. Charles Darwin
2. F. W. Went
3. Boysen and Jensen
4. Francis Darwin
Subtopic: Growth Hormones & Auxin |
94%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The ‘bakanae’ (foolish seedling) disease of rice seedlings is associated with the discovery of:
1. Auxins
2. Gibberellins
3. Ethylene
4. Abscisic acid
1. Auxins
2. Gibberellins
3. Ethylene
4. Abscisic acid
Subtopic: Gibberellin |
95%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
F. Skoog and his co-workers observed that from the internodal segments of tobacco stems the callus proliferated only if extracts of vascular tissues or yeast extract or coconut milk or DNA supplements the medium already containing:
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
Subtopic: Growth Hormones & Auxin |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
During mid-1960s, three independent researches reported the purification and chemical characterisation of three different kinds of inhibitors: inhibitor-B, abscission II and dormin. Later all the three were proved to be chemically identical. It was named:
1. Indole-3-acetic acid
2. N6-furfurylamino purine
3. Abscisic acid
4. Gibberellic acid
1. Indole-3-acetic acid
2. N6-furfurylamino purine
3. Abscisic acid
4. Gibberellic acid
Subtopic: Abscisic Acid |
93%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the two statements:
| Assertion(A): | Apical dominance is most likely adaptive. |
| Reason(R): | It is important for the plant to devote energy to growing upward so that it can get more light to undergo photosynthesis. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Growth Hormones & Auxin |
74%
Please attempt this question first.
Hints
Please attempt this question first.
One of the first gibberellins to be discovered and also the one that remains the most intensively studied form is:
1. GA1
2. GA2
3. GA3
4. GA4
1. GA1
2. GA2
3. GA3
4. GA4
Subtopic: Gibberellin |
96%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the two statements:
| Assertion (A): | Gibberellins are used to increase the length of grape stalks. |
| Reason (R): | Gibberellins help overcome apical dominance. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Gibberellin | Cytokinin |
81%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2024 GoodEd Technologies Pvt. Ltd.