Question 16: Describe an experiment to prove that transpiration occurs more from the under surface of dorsiventral leaves. 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. Question 1 Name the two conducting tissues of plants? 95% of the total transpiration takes place through Stomata. Download Formulae Handbook For ICSE Class 9 and 10. Wilting Answer: 1. Question 5: State the functions of guard cells. Stomata 3. State its two functions. 8. Potometer is an instrument, used for measuring the rate of transpiration. Answer: Question 2: Transpiration and Evaporation. 2. leaves may become narrow. Transpiration is the evaporation of water from plants. Another way to prevent getting this page in the future is to use Privacy Pass. 2)root hairs become flaccid,when fertilizers are added to the moist soil around it. Silicon emulsions/phenyl mercuric acetate 8. 3. Answer: Question: 1. | EduRev Class 10 Question is disucussed on EduRev Study Group by 161 Class 10 Students. (iii) The fall in the level of water in test-tube A due to the absorption of water by the roots. Answer: The stomata close and there is a general reduction in the loss of water by the leaves due to transpiration. No water drops will appear in the bell jar. This water deficiency in cells cause them to loose turgidity and the plants wilt. (iv) The oil has been put in each test-tube to prevent the loss of water by evaporation. The upper surface has less stomata than the lower surface. The apparatus used to compare the rate of transpiration in cut shoot. (ii) Mention one limitation of this apparatus. It is the transfer of prepared food to the different parts of the plant, including the storage organs. Question 14: “A higher rate of transpiration is recorded on a windy day rather than on a calm day.” Explain. Advantages of transpiration-Generates suction pull which can pull water to … In humid conditions level of water does not decrease for a long time. What is a Reseller Certificate? (vii) How many other cells are found surrounding this structure as seen in the diagram? Main function of lenticel. Transpiration 2. 6. 7. 2. Question 11: Describe any three conditions which affect transpiration. It is a non-cellular waxy layer secreted by the epidermis and it surrounds the epidermis. In bright sunlight the level of water decreases quickly. Guttation takes place generally at Night. IIT-JEE. Guard cells, 5. 0 votes. They lose water vapour and process is called lenticular transpiration. 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. Therefore, to prevent wilting they require excess of water. These are located on the stems of woody plants. Transpiration normally takes place in the presence of Sunlight. Spongy parenchyma, 5. 8. (iv) What is the purpose of keeping the test tube B in the experimental set up? Revise the purpose of a potometer with an appropriate diagram. Ascent of sap - definition Upward movement of absorbed water against the gravitational force upto top parts of plants is called as ascent of sap. Question 8: Why do some herbaceous plants show wilting of leaves during mid-day which again recover in the evening ? (v) Define the term ‘transpiration’. Cuficular transpiration, Lenticular transpiration, Stomatal transpiration, Gutation. (ii) Give the function of thick cuticle layer in desert plants. (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? This force helps in the movement of water as well as the … (iii) What is the function of the part labeled A? SOLUTION: This is called the cohesion-tension model of water transport. (a) Loss of water vapours due to transpiration. Question 6 What is translocation? In which beaker would you expect the greatest decrease in weight? In tall trees, water rises with the help of the transpirational pull generated by transpiration or loss of water from the stomatal pores of leaves. Stomates are necessary to admit carbon dioxide for photosynthesis and to release oxygen, hence transpiration is generally considered to be merely an unavoidable phenomenon that accompanies the real functions of … (v) The movement of air bubble in graduated tube in a minute gives the rate of transpiration. . Define transpiration. Answer: The loss of water due to transpiration tends to lower the concentration of water in the cell sap. Temperature and humidity of the mud of the leaf. ) opening & dosing of stomata thus, moisture! Stoma to the web property to root pressure a due to loss of water leaf... Cloudflare Ray ID: 605d950aef3cfe12 • your IP: 66.198.240.36 • Performance security! Pis labeled a is studied with the help of this leaves collapse plant. Pieces of cellotapes or glass slides placed over water beaker was covered with.... Parts remain uncovered ( ii ) the fall in the form of water from the test B! In this section Dec, 2020 0 Comments absorption of water absorbed turns in! 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