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Q. No.Stomata in angiosperms open and close due to:
1. Their genetic constitution
2. Effect of hormone
3. Changes of turgor pressure in guard cells
4. Pressure of gases inside the leaves
Subtopic: Stomata |
80%
From NCERT
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What is the primary form of sugar that is transported from the site of photosynthesis to the rest of the plant?
1. glyceraldehyde 3-phosphate
2. glucose
3. ribulose 1,5-bisphosphate
4. sucrose
1. glyceraldehyde 3-phosphate
2. glucose
3. ribulose 1,5-bisphosphate
4. sucrose
Subtopic: Phloem Translocation |
60%
From NCERT
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Subtopic: Osmosis |
From NCERT
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Most accepted theory for ascent of sap is?
1. capillary theory
2. root pressure theory
3. pulsation theory
4. transpiration pull
1. capillary theory
2. root pressure theory
3. pulsation theory
4. transpiration pull
Subtopic: Ascent of Sap |
64%
From NCERT
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Subtopic: The Pressure Flow or Mass Flow Hypothesis |
77%
From NCERT
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The osmotic pressure of a solution is:
1. greater than pure solvent
2. less than pure solvent
3. equal to pure solvent
4. less than or greater than pure solvent
1. greater than pure solvent
2. less than pure solvent
3. equal to pure solvent
4. less than or greater than pure solvent
Subtopic: Osmosis |
52%
From NCERT
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Subtopic: Plasmolysis |
82%
From NCERT
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Subtopic: Plasmolysis |
74%
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Unloading of sucrose from phloem to sink
1. Decreases osmotic pressure in phloem
2. Make phloem hypertonic
3. Increases the osmotic pressure in phloem
4. Lead to influx of water into phloem
1. Decreases osmotic pressure in phloem
2. Make phloem hypertonic
3. Increases the osmotic pressure in phloem
4. Lead to influx of water into phloem
Subtopic: The Pressure Flow or Mass Flow Hypothesis |
62%
From NCERT
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Chloroplasts can move within cytoplasm with the help of
1. Apoplastic movement
2. Cytoplasmic streaming
3. Plasmodesmata
4. Turgor pressure
1. Apoplastic movement
2. Cytoplasmic streaming
3. Plasmodesmata
4. Turgor pressure
Subtopic: Water Absorption |
74%
From NCERT
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