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Q. No.PGRs can be broadly divided into two groups – plant growth promoters and plant growth inhibitors. Ethylene:
1.
belongs to the group of plant growth promoters
2.
belongs to the group of plant growth inhibitors
3.
could fit either of the groups, but is largely an inhibitor of growth activities
4.
could fit either of the groups, but is largely a promoter of growth activities
Subtopic: Growth Hormones & Auxin |
79%
From NCERT
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Different types of leaves in different phases of life in cotton, coriander and larkspur are an example of:
1. Pleiotropy
2. Phenotypic plasticity
3. Developmental noise
4. Polygenic trait
1. Pleiotropy
2. Phenotypic plasticity
3. Developmental noise
4. Polygenic trait
Subtopic: Development |
90%
From NCERT
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In the exponential growth equation Nt =N0ert, e represents :
1. The base of natural logarithms
2. The base of geometric logarithms
3. The base of number logarithms
4. The base of exponential logarithms
Subtopic: Growth | Growth Model |
70%
From NCERT
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The increased growth per unit time is termed as growth rate. The exponential growth can be mathematically expressed as:
1. Lt = L0 +rt
2. Lt = L0 rt
3. W1 = W0ert
4. W1 = W0 + ert
1. Lt = L0 +rt
2. Lt = L0 rt
3. W1 = W0ert
4. W1 = W0 + ert
Subtopic: Growth | Growth Model |
75%
From NCERT
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Match each item in Column I with the one given in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Auxins | P. | Terpenes |
| B. | Gibberellins | Q. | Derivatives of carotenoids |
| C. | Cytokinins | R. | Adenine derivative |
| D. | Abscisic acid | S. | Indole compounds |
| A | B | C | D | |
| 1. | S | P | R | Q |
| 2. | P | Q | S | R |
| 3. | Q | R | P | S |
| 4. | R | S | Q | P |
Subtopic: Growth Hormones & Auxin |
93%
From NCERT
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Which one of the following plants does not show plasticity?
1. Maize
2. Cotton
3. Coriander
4. Buttercup
1. Maize
2. Cotton
3. Coriander
4. Buttercup
Subtopic: Development |
85%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
The gaseous plant growth regulator is used in plants to:
| 1. | kill dicotyledonous weeds in the fields |
| 2. | speed up the malting process |
| 3. | promote root growth and root hair formation to increase the absorption surface |
| 4. | help overcome apical dominance |
Subtopic: Ethylene |
76%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in plants?
| 1. | Cytokinin | 2. | ABA |
| 3. | Gibberellin | 4. | Ethylene |
Subtopic: Ethylene |
79%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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The living differentiated cells, that lost the capacity to divide anymore, can regain the capacity of division under certain conditions. This phenomenon is termed as:
| 1. | Redifferentiation | 2. | Maturation |
| 3. | Differentiation | 4. | Dedifferentiation |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
75%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Which hormone is used to induce immediate stomatal closure in leaves?
1. Cytokinin
2. Gibberellin
3. Abscisic Acid
4. Auxin
Subtopic: Abscisic Acid |
90%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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