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22 questions · timed · auto-graded

Question 11 Mark
Arrange and Rewrite :
Water vapour, Soil water, Leaves, Ascent of Sap.
Answer
Soil water, Ascent of sap, Leaves, Water vapour.
Explanation :
This is the sequence of stages through which water travels from the soil to the tip of the plant.
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Question 21 Mark
Choose the Odd One Out :
Stomata, Cuticle, Lenticels, Hydathodes.
Answer
Odd: Hydathodes Category : Structures through which transpiration occurs
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Question 31 Mark
Choose the Odd One Out :
Cuticular transpiration, Lenticular transpiration, Stomatal transpiration, Guttation.
Answer
Odd: Guttation Category : Types of transpiration
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Question 41 Mark
Choose the Odd One Out :
Transpiration, Photosynthesis, Phagocytosis, Guttation.
Answer
Odd: Phagocytosis Category : Plant process
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Question 51 Mark
Arrange and Rewrite :
Wounded Plant Tissue, Xylem Sap, Bleeding, Pressure Difference, Accumulation of Sap.
Answer
Wounded Plant Tissue, Pressure Difference, Xylem Sap, Bleeding, Accumulation of Sap.
Explanation:
When plant tissue is wounded, a pressure difference is created. This leads to the flow of xylem sap towards the site of injury. The phenomenon, known as bleeding, results in the accumulation of sap at the wound site, indicating the plant's response to injury and the movement of fluids within its vascular system.
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Question 61 Mark
Arrange and Rewrite :
Stomatal opening, Water vapour exits through stomata, Guard cells swell, Accumulation of potassium ions in guard cells.
Answer
Accumulation of potassium ions in guard cells, Guard cells swell, Stomatal opening, Water vapour exits through stomata.
Explanation:
In the potassium ion exchange theory, the process starts with the accumulation of potassium ions in the guard cells. This causes the guard cells to swell, leading to the opening of the stomata. Once the stomata are open, water vapour can exit through them, facilitating stomatal transpiration.
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Question 71 Mark
Arrange and Rewrite :
Potometer Experiment, Measurement of Water Uptake, Transpiration Rate, Leafy Shoot, Data Analysis.
Answer
Potometer Experiment, Leafy Shoot, Measurement of Water Uptake, Transpiration Rate, Data Analysis.
Explanation:
A potometer experiment with a leafy shoot measures water uptake, reflecting the transpiration rate. This measurement provides data on transpiration, allowing analysis of factors affecting transpiration and plant water transport efficiency.
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Question 81 Mark
Arrange and Rewrite :
Exudation of water droplets, visible in the early morning, Opening of hydathodes, High root pressure in plants, Guttation on leaf edges.
Answer
High root pressure in plants, Exudation of water droplets, Opening of hydathodes, Guttation on leaf edges, Visible in the early morning.
Explanation:
The process of guttation starts with high root pressure in plants. This pressure leads to the exudation of water droplets from the plant's vessels. These droplets are then released through specialized structures called hydathodes. Water droplets are released at the leaf edges, known as guttation, typically visible in the early morning.
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Question 91 Mark
Arrange and Rewrite :
Water loss due to transpiration, Potted plant, or leafy shoot in a test tube, Decrease in weight, Measurement of weight loss.
Answer
Potted plant or leafy shoot in a test tube, Water loss due to transpiration, Decrease in weight, Measurement of weight loss.
Explanation:
The sequence begins with a potted plant or a leafy shoot placed in a test tube. As transpiration occurs, water is lost from the plant or shoot, leading to a decrease in its weight. This loss in weight is then measured, providing a quantitative assessment of the rate of transpiration.
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Question 101 Mark
Arrange and Rewrite :
Root Absorption, Xylem, Leaf, Transpiration, Water Cycle
Answer
Root Absorption, Xylem, Leaf, Transpiration, Water Cycle
Explanation:
The sequence begins with root absorption, where roots absorb water from the soil, which then ascends through the xylem to the leaves. In leaves, water vapour is released into the atmosphere through transpiration, integrating terrestrial and atmospheric water systems in the water cycle.
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Question 111 Mark
Arrange and Rewrite :
Stomata Opening, Water Vapour, Leaf Surface, Transpiration, Cooling Effect
Answer
Leaf Surface, Stomata Opening, Water Vapor, Transpiration, Cooling Effect.
Explanation:
The process starts at the leaf surface, where the stomata open. This opening allows water vapour to escape from the leaf, a process known as transpiration. Transpiration helps in regulating the plant's temperature through its cooling effect.
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Question 131 Mark
State the Function :
Guard cells
Answer
Regulate the rate of transpiration by opening and closing of stomata.
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Question 141 Mark
State the Function :
Hydathodes
Answer
Plants secrete excess of water through hydathodes when atmosphere is very humid and_x000D_ transpiration process cannot occur.
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Question 161 Mark
State the Function :
Lenticels
Answer
They help in gaseous exchange in woody parts of the plant and some amount of water is_x000D_ lost by transpiration.
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Question 171 Mark
State the Function :
Stomata
Answer
(a) Gaseous exchange._x000D_
(b) Loss of water vapours due to transpiration.
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Question 201 Mark
State the Location :
Cuticle
Answer
On the outer surface of the primary organs of all vascular land plants.
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Question 221 Mark
State the Location :
Stomata
Answer
In the epidermis of young green, aerial parts of plants, especially the leaves.
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Do as Directed. - Biology STD 10 Questions - Vidyadip