At the root apex the cells of the meristematic region are not characterized by:-
1. Being rich in protoplasm
2. Abundant plasmodesmatal connections
3. A cell wall that is primary in nature
4. Having small inconspicuous nuclei
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAll the following plants are biennials except:-
1. Sugarbeet
2. Cabbages
3. Carrots
4. Wheat
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe growth of a root elongating at a constant rate will be represented by:
1. A only
2. B only
3. Both A and B
4. Neither A nor B
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFruit and leaf drop at early stages can be prevented by the application of
1. Cytokinins
2. ethylene
3. auxins
4. gibberellic acid
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOne of the synthetic auxin is
1. NAA
2. IAA
3. GA
4. IBA
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following statements about plant hormones is false?
1. The growth of plants in nature is probably regulated by a combination of growth-stimulating and growth-inhibiting hormones.
2. Abscisic acid generally promotes growth.
3. Gibberellins stimulate cell enlargement.
4. Cytokinins promote cell division.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn most situations, which of the following acts as an antagonist to GAs?
1. ABA
2. IAA
3. Kinetin
4. Ethylene
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCytokinin does not help in:
1. Lateral shoot growth
2. Overcoming apical dominance
3. Adventitious shoot formation
4. Promoting leaf senescence
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology