Besides, discover the factors affecting transpiration with elaborate explanations by a Biology expert in our video lessons. The movement of water out of the leaf stomata creates, when the leaves are considered collectively, a transpiration pull. (ii) Dicot leaf. (iv) Gives rigidity and protection to the cell. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and … (iii) Give a reason for your answer in (ii) above. Question 2 What is the function of transpiration? (ii) It results in cooling of the plant in summer. 10. Guttation and transpiration are two such words. Plants in which lenticular transpiration. This water deficiency in cells cause them to loose turgidity and the plants wilt. (True) 5. Answer: Transpiration rate in such plants is very high during mid day and exceeds the water absorption rate of the roots. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers.Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. Like animals, plants need water to survive. Question 8: Why do some herbaceous plants show wilting of leaves during mid-day which again recover in the evening ? Answer: Question 9: Cobalt chloride paper and Goat’s bladder. 4. Transpiration is the process by which plants absorb water from the soil, circulate it to all the branches and leaves to eventually release water vapor in the atmosphere through the pores of the leaves. Question 4: Where are stomata generally found ? Write the correct answer out of the five available choices given under each question: I. This loss of water in the leaves exerts a pull on the water in the xylem ducts and draws more water into the leaf. Using ICSE Class 10 solutions Absorption by Roots exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. A night dotted arrow shows the path of oxygen while solid arrow shows the path of CO2: (iii) Yes, we can add one more arrow in the figure to show the loss of water during transpiration. Answer: (i) Stomatal transpiration. 2. ICSE Solutions for Chapter 4 Transpiration Class 10 Biology. Another way to prevent getting this page in the future is to use Privacy Pass. Question 5: The figure given below represents an experimental set up with a weighing machine to demonstrate a particular process in plants. (v) A similar apparatus is set up without the potted plant. Transpiration is the process by which excess water in plants is lost to the atmosphere in the form of water vapour through tiny pores present on the surface of the leaf called stomata. Answer: Guard cells regulate opening and closing of stomata thus, control gas exchange and transpiration. 1 Mark Questions Answer : Lenticels help in facilitating the process of transpiration in woody plants. (iv) It is used to adjust the position of air bubble in graduated capillary tube. It is used for the process of transpiration to check the presence of water. In which beaker would you expect the greatest decrease in weight? (ii) Is the experimental leaf a monocot or a dicot? (i) A, V. (v) D and E. Question 11: Given below is an apparatus used to study a particular process in plants. 5. Your IP: 66.198.240.36 During the day guard cells begin photosynthesis and the sugar produced during the process increases the osmotic pressure which draws in water from the adjoining cells. Answer: (i) Garreau’s Potorneter. Stomatal transpiration 5. (iii) The fall in the level of water in test-tube A due to the absorption of water by the roots. Potometer is an instrument, used for measuring the rate of transpiration. Transpiration is the process of exhalation of water vapour through stomata. Get access to Selina Solutions for ICSE Class 10 Biology Chapter 5 Transpiration at TopperLearning. Loss of water from the aerial parts of a plant. 11. Potometer is an instrument for measuring the rate of the most transpiration in a herbaceous plant like Balsam occurs through which part. (iii) To prevent water vapour of the air from interfering the experiment. Transpiration pull is a physiological process can be defined as a force that works against the direction of gravity in plants due to the constant process of transpiration in the plant body. Question 7: Study the diagram given below and answer the questions that follows: (i) Name the process being studied in the above experiment. (ii) Lenticular transpiration. (iv) What is the function of the part marked ‘reservoir’? Answer: Lenticels are minute, permanent openings which may develop in the young stems of woody plants. Transpiration is important in plants for three major reasons: Cooling of the plant: the loss of water vapour from the plant cools down the plant when the weather is very hot. Transpiration pull-- the upwards movement of water is accounted for by a mechanism called transpiration pull. It takes place through the sweat pores of the sweat glands. Transpiration Pull. Question 9. Weight of test tube B will remain same after the experiment because water will not be lost by transpiration as there is no plant in and nor by evaporation as oil is spread over it, which will not allow evaporation. Where are they found ? Study the same and ansvver the questions that follow : (i) Name the apparatus. Discussion of water transport through the xylem. 6. Chapter 3 Absorption by Roots- The Process Involved Questions Answers Class 10 Biology 03 Dec, 2020 0 Comments. TopperLearning’s chapter resources for ICSE Class 10 Biology – Transpiration will help you grasp the concept of how plants lose water vapour. Transpiration. If for any reason the water content of the leaf is falling short, the guard cells fail to remain turgid, they turn flaccid or lose turgidity, thereby closing the stomatal opening (Fig. Cuticular transpiration 3. Answer: Transpiration is a process in which excess of water is lost in the form of vapours from the aerial parts of the plant. 3. It is also called exudation. Question 3: Given below are the diagrams of a certain structure in plants in two conditions. (False, It occurs through hydathodes.). Transpiration produces a tension or ‘pull’ on the water in the xylem vessels by the leaves. Guttation is the elimination of excess of water from plants through : (a) Stomata (b) Hydathodes (c) Lenticels (d) Wounds. Transpiration normally takes place in the presence of Sunlight. Answer: Question 1: The diagram below represents a structure found in a leaf. The questions involved in ICSE Solutions are important questions that can be asked in the final exam. Stomata, Cuticle, Lenticels, Hydathodes. Question 3 What is transpiration? It protects the surface and reduces water loss. A chemical used to prevent excessive transpiration in plants. (ii) What will be the observations in the two test-tubes after about 2-3 days? Transpiration is an essential process for the plants because : (i) It creates a suction pull (transpiration pull) due to which water and minerals rise high up in the tall trees. (v) Where is this structure likely to be found in a leaf? . Answered What do you mean by transpiration? 3. 3. Transpiration Definition. In the air above, the moisture forms clouds and soon falls as rain. Answer : Odd term : Phagocytosis. Stomata pass out water in the form of vapours. (ii) After a few hours, the CaCl2 vials were taken out and weighed again. Which side of the leaf has more stomata ? (ii) What is the biological term for the above structure? In which beaker the change of weight would be minimum? The pH of the guard cells increases during day time. 7. 3. Give a reason to support your answer. Inner wall of guard cells, 3. (iv) Only one leaf vein has been shown in this section. Transpiration: Explained! Hydathodes 9. Low humidity in the atmosphere results decrease in the rate of transpiration. (ii) Define the above mentioned process. Loss of water as droplets through leaves of an intact plant. (ii) It lowers the rate of transpiration thus conserving water. Also define transpiration pull. Question 7: Forest bring in the rain, transpiration is the cause. Guttation 6. Transpiration, in botany, a plant’s loss of water, mainly though the stomates of leaves. (iii) Weight of test tube A will decrease after the experiment because water will be lost from it through the leaves by transpiration,. The leaves of the Xerophytic plants have cuticular wax. Answer: (i) Transpiration: Loss of water as water vapour from aerial parts of the plant. Question 4: Plants absorb more water than their requirement. Transpiration definition, an action or instance of transpiring. Thus, the leaves loss its turgid state and show wilting. Question 15: Explain the relationship between transpiration through the aerial parts and absorption by the root hairs. The remaining 97–99.5% is lost by transpiration and guttation. ADVERTISEMENTS: The below mentioned article includes a collection of thirteen experiments on transpiration. Define a taxon. (ii) After 2-3 days the level of water falls in test-tube A while it remains constant in test tube B. Answer: When water is lost by evaporation (transpiration) heat energy is taken up from the plant body to vapourize the water, here the water is rapidly taken up by the roots and again released through the leaves by transpiration. Stomata open during day and close at night because : (a) Photosynthesis occurs during day time only (b) Enzymes convert starch into sugar at elevated pH in night (c) Loss of sugar increases osmotic concentration of the cell sap (d) Loss of starch in day time raises OP of subsidiary cells, 3. SOLUTION: No water drops will appear in the bell jar. Nov 23,2020 - Define transpiration. Openings found on the under surface of the dorsiventral leaf are Stomata. Exercise (A) Multiple Choice Type Question 1: Transpiration pull will be maximum under which set of the following conditions? Answer: (i) The guard cells are located in the leaves. (ii) It is the release of water vapours from the aerial parts of the plant. (iii) What was the purpose of using a mano-meter? To obtain a continuous supply of minerals it has to absorb large quantity of water. (iv) The opening and dosing mechanism of stomata is regulated by the amount of water and solutes present in the guard cells. Answer: Stomata present, on the leaf and open only during the day while lenticel present on the stem of woody plants and open at all the times. Answer: (i) Transpiration. See more. It has reticulate venation. In turn, water is absorbed from xylem. It acts as an organ of gaseous exchange. (ii) Due to high rate of transpiration plant suffer from loss of turgidity. absorption by root class 10 (biology) short questions 1)how is root hair structurally adapted for absorption of water from the soil? Water molecules stick to one another through cohesion forming a column in the xylem. More transpiration occurs from the upper surface of a leaf. 8. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and Equations Chapter. 5. They are covered with a protective layer of dead calls having tiny openings called lenticels. (Guttation) 3. We Provide Answer of Progress Check , MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type Questions and Structured / Applications / Skill Type Questions of Exercise-5 Transpiration ICSE Class-10 Concise.Visit official Website CISCE for detail information about ICSE Board Class-10. Guard cells, 5. Since water is vital for plants, many of the fancy words relating to plants have to do with water. (Hydathodes), 1. (iv) Transpiration is the loss of water in the form of water vapour from the aerial parts of the living plants. A transpiration pull could be simply defined as a biological process in which the force of pulling is produced inside the xylem tissue. (iii) It takes place through the leaves and stem and through the stomata and lenticels. (False, Evaporation is a physical process.) (v) What is the role of the air bubble in the experiment? Blog. It is the loss of water in the form of water vapour from the aerial organs of the plant. The process of release of water in the form of water vapor is called transpiration. In Nerium, the stomata are present in Sunken pits. explain. Answer : Balsam is a herbaceous plant that loses too much of water by excessive transpiration, i.e., the rate of transpiration is more than the rate of absorption. Question 9: Guard cells are small in size and are kidney shaped in outline. Water is continually being lost from leaves by transpiration. Answer: Question 2: Transpiration and Evaporation. Transpiration, Photosynthesis, Phagocytosis, Guttation. Question 1: Transplanting of seedlings to flowerbed in the evening is better than doing so in the morning. Calcium chloride paper is used to demonstrate transpiration. The substances which check the rate of transpiration. Answer: Question 5: Transpiration and Translocation. (iii) What is the function of the part labeled A? Transpiration is the loss of water in the form of water vapours from the aerial parts of the plant.. Silicon emulsions/phenyl mercuric acetate 8. (False, Moist cobalt chloride paper turns pink in colour.) Ascent of sap - definition Upward movement of absorbed water against the gravitational force upto top parts of plants is called as ascent of sap. Answer: On a hot sunny day, the rate of transpiration exceeds the rate of water absorption by roots. These regulate the stomatal opening for transpiration and diffusion of gases and close in order to reduce water transpiration. Lower side 5. Therefore, to prevent wilting they require excess of water. Course. Answer: Older portions of the root do not have root hairs. The pull is created through water surface tension within the plant cells. IIT-JEE. asked Mar 17, 2018 in Biology by nikita74 (-1,017 points) plant physiology. Stomate, any of the microscopic openings or pores in the epidermis of leaves and young stems. In strong light, the rate of transpiration is more because stomata are wide open. 6. When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink ? Transpiration is defined as the loss of water vapour by the plant. (i) Name the structure shown. Question 2: Name the three types of transpiration. Answer: (i) The colour of dry cobalt chloride paper is blue. Transpiration is a physiological process. The whole process can be compared to a person (transpiration pull) pulling a bucket full of water with a steel rope (unbroken and continuous water column) Transpiration. This is called the transpiration stream. Transpiration 2. (False, More transpiration occurs from the under surface of a leaf.) Stomata 5. Multiple Choice Type Question 1: Absorption of … Guard cell of stoma. However, transpiration is tightly controlled. so water is pulled up through the plant. Guttation. Darwin’s potometer 10. State its two functions. What other factors might plants be affect by? 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