(v) State the purpose of setting up test tube B. Method: 1. Woody trees 6. (False, Moist cobalt chloride paper turns pink in colour.) 6. asked Nov 3, 2017 in Class X Science by aditya23 (-2,145 points) 0 votes. Define transpiration and explain why it occurs in plants. In strong light, the rate of transpiration is more because stomata are wide open. This is how the two processes are interrelated. The escape of plant sap from the ruptured or cut surfaces of the plant due to root pressure. 10. Answer: (a) Light intensity: It increases or decreases the rate of transpiration. Question 3: Young plants will an a hot sunny day. Transpiration pull is the force which helps in drawing the water upward from roots to leaves This video is about: Transpiration Pull. The theory states that water lost from mesophyll cells by transpiration. (False, Evaporation is a physical process.) Your IP: 66.198.240.36 Question 6: Study the diagram given alongside and answer the questions that follow: (i) Explain the physiological process being study. 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. Transpiration, on the other hand, happens during the day and usually when there's dry heat. 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. Answer: Stomata are generally found on the epidermis of the leaf. When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink ? Question 5 Name the various cells through which water moves upwards to reach the leaves? Stoma. As a result of this leaves collapse and plant wilts. 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. Transpiration pull is the force which aids in drawing the water upward from roots to leaves. NCERT Easy Reading. We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. The time taken for the cobalt chloride paper on the upper surface of the leaf to turn pink is much longer than for the under surface. Transpiration pull-- the upwards movement of water is accounted for by a mechanism called transpiration pull. (iii) It takes place through the leaves and stem and through the stomata and lenticels. Guttation and transpiration are two such words. It takes place through the opening on the stems of woody plants, called lenticels. 2. The water in each beaker was covered with a layer of oil. 5. Stomata 5. Advantages of transpiration: Ascent of sap and removal of excess water: Transpiration helps to maintain a proper balance of water in plants since plants have a tendency to absorb more water than needed. 26.10.2019 English Secondary School +50 pts. The process by which excess of water is forced out directly from the tips of veins in the leaf. It is the process in which water droplets oozes out from the hydathodes present at the tip and margins of leaves. Plants absorb a large quantity of Water, from soil by means of roots and root hairs. (Light opens stoma) Plant 1 grew more in the fridge, than plant 4 did in a cupboard; Why? Palisade tissue, 4. It means by increasing 10 0 C temperature, the rate of transpiration is approximately double. 3. Transpiration Pull. The movement of water out of the leaf stomata creates, when the leaves are considered collectively, a transpiration pull. Answer: Question 3: Stomata and Lenticels. Most of the water absorbed by the roots of a plant—as much as 99.5 percent—is not used for growth or metabolism; it is excess water, and it leaves the plant through transpiration. (ii) What is the biological term for the above structure? Write the functional activity of the following structures: 1. No water drops will appear in the bell jar. Question 1 Name the two conducting tissues of plants? So more water is lost than absorbed. 4. Question 7 How […] Guttation 8. It is the transfer of prepared food to the different parts of the plant, including the storage organs. It may be due to excessive transpiration as compared to absorption of water by roots. (i) These are located on the lower surface of dicot leaves and both upper and lower surfaces of monocot leaves. Define transpiration. Revise the purpose of a potometer with an appropriate diagram. What other factors might plants be affect by? 2. 5. The pull is created through water surface tension within the plant cells. Get access to Selina Solutions for ICSE Class 10 Biology Chapter 5 Transpiration at TopperLearning. (vi) Transpiration is the loss of water as water vapours from the aerial parts of the plant. Our Biology experts have provided answers for ‘True or False’ questions from your textbook with supporting reasons for each answer. Transpiration definition, an action or instance of transpiring. Answer: The loss of water due to transpiration tends to lower the concentration of water in the cell sap. However, transpiration is tightly controlled. In the mechanism of opening and closing of stomata, the important factor is : (a) The presence of chloroplast in the guard cells (b) The turgid and flaccid state of the guard cells (c) The protein content of the cells (d) The starch content of the cells, 2. 1. (ii) Name the parts numbered 1-5. (ii) Due to high rate of transpiration plant suffer from loss of turgidity. If the roots of land plants remain waterlogged, then lenticels will not be able to do gaseous exchange and as a result of this plants will die. Answer: Transpiration pull: As the water is lost from the leaf surface by transpiration, more water molecules are pulled up due to the tendency of water molecules to remain joined (cohesion), and thus- to produce a continuous column of water through the stem. The amount of water lost by plants over a period of time refers to … 4)define cohesive and adhesive forces. They are firmly held in place by pieces of cellotapes or glass slides. (True) 2. Lenticels 4. Answer: The three conditions which affect transpiration are the following : Question 12: What are the advantages of transpiration to the plant ? Study the same and then answer the questions that follow: (i) What is the colour of dry cobalt chloride paper? Answer: A pulling force called suction, caused by the evaporation of water in a leaf draws a long, continuous column of water through the xylem from the root to the leaf. Answer: (i) Transpiration (ii) It is the process by which plants lose water as vapours through the aerial parts. 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. (iv) D,  III. 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. Lower side 4. Transpiration definition, an action or instance of transpiring. (v) Suggest a suitable control for this experiment. 9. Exercise (A) Multiple Choice Type Question 1: Transpiration pull will be maximum under which set of the following conditions? Answer: Question 7: Stomata and Hydathodes. Multiple Choice Type Question 1: Absorption of … (vii) Five. Thus, it proves that the rate of transpiration is greater from the under surface of dorsiventral leaves. (iii) Give a reason for your answer in (ii) above. Give reasons to justify your observation in A & B. 9. NCERT. Answer: (i) Stomatal transpiration. (iii) Why is the pot covered with a plastic sheet ? Take a well-watered, healthy potted plant and cover the pot with the help of rubber sheet (iii) Water escapes through stomata and lenticels. (i) A (ii) B (iii) C (iv) D (v) E II. a. Transpirational theory was proposed by Dixon and Jolly. Answer: Transpiration rate in such plants is very high during mid day and exceeds the water absorption rate of the roots. (iv) It is used to adjust the position of air bubble in graduated capillary tube. Guttation occurs through stomata. The OP increase and water potential decreases. SOLUTION: TopperLearning’s chapter resources for ICSE Class 10 Biology – Transpiration will help you grasp the concept of how plants lose water vapour. 1 answer. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. The structures through which guttation occurs. Performance & security by Cloudflare, Please complete the security check to access. Bleeding 7. It is a biological process where the water molecules and ions are absorbed up from the roots, and then evaporation occurs within the leaves, spreading water throughout the plant. Give a reason to support your answer. (ii) Give the function of thick cuticle layer in desert plants. Answer: (i) The colour of dry cobalt chloride paper is blue. This phenomenon is known as transpiration pull. The root of a plant absorbs water from the soil. • Calcium chloride paper is used to demonstrate transpiration. ICSE Solutions for Chapter 4 Transpiration Class 10 Biology. (ii) Stomatal apparatus. (v) The movement of air bubble in graduated tube in a minute gives the rate of transpiration. Please enable Cookies and reload the page. Root hairs are the extensions of the outer epidermal cells of the root. (a) Loss of water vapours due to transpiration. It may also be due to blocking of the xylem elements, pathogens or parasites. (iv) Transpiration is the loss of water in the form of water vapour from the aerial parts of the living plants. It takes place through the skin. Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl2) contained in two small vials were weighed and placed in both the cups. Like animals, plants need water to survive. (iv) How many leaf veins have been shown in this section ? Transpiration is defined as the loss of water vapour by the plant. Guttation is a similar process to transpiration in which some plants exudate the drops of xylem sap on the edges of the leaves. Cuticular transpiration: Cuticle is an impermeable covering present on the leaves and stem. Answer: Question 6: Transpiration and Perspiration. The remaining 97–99.5% is lost by transpiration and guttation. Answer: Guard cells regulate opening and closing of stomata thus, control gas exchange and transpiration. Experiment to demonstrate the transpiration phenomenon with the bell jar method: ADVERTISEMENTS: Requirements: Bell jar, well-watered potted plant, rubber sheet, glass plate, Vaseline. 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. (iii) Transpiration. (Hydathodes), 1. (v) What is the role of the air bubble in the experiment? Potometer is an instrument, used for measuring the rate of transpiration. (iv) The cobalt chloride paper placed on the lower surface of the leaf will show more pink dots as there are more stomata. Cuficular transpiration, Lenticular transpiration, Stomatal transpiration, Gutation. 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. Answer: (i) (b)   (ii) (d)   (iii) (e)   (iv) (a)   (v) (c), ICSE Previous Year Question Papers Class 10, ICSE Solutions for Class 10 Biology – Transpiration, Concise Mathematics Class 10 ICSE Solutions, Concise Chemistry Class 10 ICSE Solutions, Concise Mathematics Class 9 ICSE Solutions, Plus Two Computerized Accounting Practical Question Paper March 2019, Plus One Economics Chapter Wise Previous Questions Chapter 7 Employment – Growth, Informalisation and Related Issues, Plus One Economics Chapter Wise Previous Questions Chapter 6 Rural Development, Plus One Economics Chapter Wise Previous Questions Chapter 5 Human Capital Formation in India. In hot summer days, plant cooling is due to : (a) Loss of water vapours from leaves (b) Transport of water in plant (c) Loss of lkjuid water (d) Loss of water from entire plant, 4. Question: 1. (Guttation) 3. Cloudflare Ray ID: 605d950aef3cfe12 (i) Name the structure shown. It is the "engine" that pulls water up from the roots to: supply photosynthesis (1%-2% of the total); bring minerals from the roots for biosynthesis within the leaf; cool the leaf. Thus, it helps in ascent of sap. Question 14: “A higher rate of transpiration is recorded on a windy day rather than on a calm day.” Explain. (iv) After about half an hour what change, if any, would you expect to find in the cobalt chloride paper placed on the dorsal and ventral sides of the leaf? (ii) What do the two arrows (dotted and solid) indicate in the day time and at night ? 3. (b) Humidity of the atmosphere. (i) A (ii) B (iii) C (iv) D (v) E IV. so water is pulled up through the plant. b) It prevents the plant parts from heating up. This is called the cohesion-tension model of water transport. A. Bleeding is the flow of the plant sap at the sites of injury or cuts. 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. After a few hours, CaCl2 vials were taken out and weighed again. IIT-JEE. The value of Q 10 for transpiration is 2. (iv) Describe the mechanism which brings about the change in the structure depicted in A and B. 7. Transpiration normally takes place in the presence of Sunlight. (True) 5. Cuticular transpiration takes place through the cuticle (waxy layer) covering the leaves. Transpiration: Explained! Transpiration is the loss of water In the form of water vapour from the leaves of the plant. Question 2: Land plants die if their foots remain water logged. Hence, the guard cells become turgid and bulge outward due to their thin outer wall, thus widening the stomatal opening lying in between (Fig. Download Formulae Handbook For ICSE Class 9 and 10. The process of release of water in the form of water vapor is called transpiration. Explain the term transpiration. Transpiration 2. 3. The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of it is from the evaporation. Transpiration pull theory is the proposed mechanism by which trees draw water through their roots. (v) Where is this structure likely to be found in a leaf? (ii) Explain the process named in (i) above. (ii) What will be the observations in the two test-tubes after about 2-3 days? Therefore, to prevent wilting they require excess of water. Question 6 What is translocation? This is called the transpiration stream. See more. Question 8: (i) Name the organ in which guard cells are located and mention the main functions of these. 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