Match the term in Column ‘II’ with the suitable idea given in Column ‘I’. Transpiration is the process in which plants release the water inside it in the form of moisture or water vapor. Answer: Wind causes faster movement of air and remove the moist air and faster evaporation of water and therefore higher rate of transpiration. Cuticle, 2. Cuticular transpiration 3. Answer: Guard cells regulate opening and closing of stomata thus, control gas exchange and transpiration. 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. Next lesson. It takes place through the opening on the stems of woody plants, called lenticels. Silicon emulsions/phenyl mercuric acetate 8. (iii) What was the purpose of using a mano-meter? Transpiration is not simply a hazard of plant life. Water and dissolved sugars. (ii) A plant with sunken stomata. Transpiration: Occurs early morning and at night. Defination of Transpiration in Biology The loss of excess water by diffusion through the stomata of leaves of a plant into the atmosphere is called transpiration. Plants lose water by guttation when: (a) Rate of transpiration is high (b) Soil is wet and the atmosphere is humid (c) Soil is dry and atmosphere is dry (d) Soil is wet and atmosphere is dry, 8. Transpiration is defined as the loss of water vapour by the plant. Spongy parenchyma, 5. In common land plants cuticular transpiration is only 3-10% of the total transpiration. You can watch our video lessons to understand different types of transpiration such as lenticular transpiration, cuticular transpiration and stomatal transpiration. It is used for the process of osmosis as semi- permeable membrane. Thus, the root hair with its semi-permeable membrane and hypertonic cell sap establish an osmotic system with the water available in the soil surrounding the root hair. ICSE Biology Previous Year Question Paper 2010 Solved for Class 10 ICSE Paper 2010 BIOLOGY SECTION-I (40 Marks) (Attempt all questions from this Section) Question 1: (a) Name the following : (i) The type of cell division which occurs in the cells of the reproductive organs. Write the correct answer out of the five available choices given under each question: I. Question 4: Plants absorb more water than their requirement. Complete the following sentences with appropriate words : 1. the insertion of a single air bubble into the apparatus is very difficult. Question 3: What is meant by the term transpiration stream ? The heart does this with so much pressure that it is capable of squirting blood up to 9 meters high. 8. 9. In which beaker the change of weight would be minimum? It is instead lost through transpiration, the evaporation of water through the leaf surface and stomata, and through guttation, which is the loss of water from the vascular tissues in the margins of leaves. Download CBSE Class 10 Science Transportation Notes in pdf, Science chapter notes, class notes mind maps formulas Revision Notes TRANSPORTATION ... 4.1 (c) Transpiration : Most of the water absorbed is lost through the aerial parts of the plant into air by a process called ... CBSE Class 10 Science Biology … Hydathode: A water secreting gland found on the edges and tips of leaves of many plants. The apparatus used to compare the rate of transpiration in cut shoot. It is instead lost through transpiration, the evaporation of water through the leaf surface and stomata, and through guttation, which is the loss of water from the vascular tissues in the margins of leaves. NCERT CBSE Chapter 6 Download in Pdf Life processes – The processes that are necessary for an organism to stay alive. 8. (v) State the purpose of setting up test tube B. Nutrition,respiration, etc. (ii) The capillary tube should be properly dipped into the water. Cuticular Transpiration: It occurs through the cuticle or epidermal cells of the leaves (Fig. It is a physical change controlled by the temperature and humidity of the atmosphere. Answer : Odd term : Phagocytosis. The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of it is from the evaporation. Mention, if the following statements are True or False. Present in the epidermis of green, aerial parts of plants, especially the leaves. Potometer is an instrument, used for measuring the rate of transpiration. Water is lost as vapour via the stomata. The substances which check the rate of transpiration. This is the currently selected item. Study class 10 notes & practice ICSE board sample papers to score high in exams. 2. 9. To do so, our learning portal enables you with resources such as sample papers, practice tests and previous years’ question papers. (ii) Give the function of thick cuticle layer in desert plants. All rights reserved. Experiments on transpiration include demonstration of transpiration, determining site of greater transpiration, relation with absorption and suction due to transpiration. Answer: Question: 1. Question 8: Why do some herbaceous plants show wilting of leaves during mid-day which again recover in the evening ? Question 7: Study the diagram given below and answer the questions that follows: (i) Name the process being studied in the above experiment. Find out about the ear lobes of the parents of each student in the class. Loss of water as droplets through leaves of an intact plant. The escape of plant sap from the ruptured or cut surfaces of the plant due to root pressure. This force helps in the movement of water as well as the minerals dissolved in it to the upper parts of the plants. Question 3: What is meant by the term transpiration stream ? Give a reason to support your answer. Mainly it occurs at the leaves while their stomata are open for the passage of CO 2 and O 2 during the process of photosynthesis. 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. Question 13: What are the disadvantages of transpiration ? Plants in which lenticular transpiration. More than 10% of the earth’s moisture is from transpiration. Answer: The three conditions which affect transpiration are the following : Question 12: What are the advantages of transpiration to the plant ? (iii) Cuticular transpiration. What does the xylem transport in a plant? It is used for the process of transpiration to check the presence of water. Parts of plants such as stems, small pores on leaves, and flowers evaporate the water to the atmosphere. Answer: 1. (iii) To prevent water vapour of the air from interfering the experiment. Give a reason to support your answer. (ii) Lenticular transpiration. Question 5: State the functions of guard cells. (i) A,  V. (v) D and E. Question 11: Given below is an apparatus used to study a particular process in plants. Answer: Question 8: Guttation and Bleeding. Hydathodes send out water in the form of droplets. Thus, the leaves loss its turgid state and show wilting. Question 16: Describe an experiment to prove that transpiration occurs more from the under surface of dorsiventral leaves. The ends of the cups were closed with corks through which two mercury manometers were connected. Lenticular 4. 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. Lower side 4. Transpiration 2. The structures through which guttation occurs. B) and the transpiration stops. Answer: (i) 1. Briefly explain how does transpiration  help in upward conduction of water in the plants, Please explain the steps to measure transpiration, Explain the mechanism of stomatal transpiration step by step. (i) These are located on the lower surface of dicot leaves and both upper and lower surfaces of monocot leaves. Transpiration is the process of water loss from leaves of plants through stomata. Palisade tissue, 4. (v) Loss of water as water vapour from the aerial parts of the plant. Takes place through the stomata. Transpiration is one of the interesting sessions and it helps to get 100 marks in ICSE Class 10 Biology. Lenticels 4. Functions of stomata. Want a call from us give your mobile number below, For any content/service related issues please contact on this number. Sweat containing urea, uric add and salts are removed with water. Hydathodes 9. (ii) Name the parts numbered 1-5. Stomata 3. (iii) Could you add one more arrow in the figure ? Adaptations in plants to reduce transpiration … (v) The movement of air bubble in graduated tube in a minute gives the rate of transpiration. Question 8: Given below is the diagram of an experimental set up to study the process of transpiration in plants. In dim light or on a cloudy day the stomata are partially closed reducing the rate of transpiration. Question 7: What are lenticels ? 7. (v) 1. (iv) 1. If the rate of transpiration becomes more than the rate of photosynthesis, plants will: (a) Continue to live, but will not be able to store food (b) Be killed instantly (c) Grow more vigorously because more energy will be available . (ii) Explain the process mentioned in (i) above. (iv) Only one leaf vein has been shown in this section. 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. As the stomata open, the diffusion of gases in and out begins for fulfilling the need for photosynthesis and for allowing transpiration. Answer: Two equal pieces of cobalt chloride paper are dried and placed one on the upper surface and the other on the lower surface of dorsiventral leaves. It is the loss of water in the form of water vapour from the aerial organs of the plant. (v) The purpose of setting up test-tube B is to show that in the absence of plant, there is no change in the level of water. Phloem & translocation. Transpiration pull is the biological process of force by which the plants draw water in the upward direction. All the other three terms are concerned with processes in plants. It is the transfer of prepared food to the different parts of the plant, including the storage organs. Question 4: Where are stomata generally found ? Transpiration is the evaporation of water from plants. Answer: Stomata are generally found on the epidermis of the leaf. Main function of lenticel. Most of the water a plant absorbs is not used for a plant’s daily functioning. Study the diagram and answer the following questions: (i) Name the process intended for study. Practice: Transportation in plants. (True) 3. Intro to vascular tissues (xylem & phloem) Xylem & transpiration . Write the functional activity of the following structures: 1. Cuficular transpiration, Lenticular transpiration, Stomatal transpiration, Gutation. This is called the transpiration stream. Guttation. Question 9: What is the advantage of wilting to a plant ? Caused by … (False, More transpiration occurs from the under surface of a leaf.) ICSE Biology Previous Year Question Paper 2010 Solved for Class 10 ICSE Paper 2010 BIOLOGY SECTION-I (40 Marks) (Attempt all questions from this Section) Question 1: (a) Name the following : (i) The type of cell division which occurs in the cells of the reproductive organs. Question 7: Forest bring in the rain, transpiration is the cause. 4. (iv) What is the function of the part marked ‘reservoir’? Question 2: Name the three types of transpiration. 1 Mark Questions Answer : Lenticels help in facilitating the process of transpiration in woody plants. Answer: The stomata close and there is a general reduction in the loss of water by the leaves due to transpiration. 3. A transpiration pull could be simply defined as a biological process in which the force of pulling is produced inside the xylem tissue. 7. Loss of water from the aerial parts of a plant. Question 6: How does a stomata differ from a lenticel ? It is known to be a part of the water cycle. (i) What is the purpose of keeping CaCl2 vials inside the cup? (iii) Water escapes through stomata and lenticels. No water drops will appear in the bell jar. A plant having sunken stomata. Which plant would remain healthy for a longer period of time? Answer: (i) Transpiration. (iii) 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. 2. (v) On the epidermis of leaf. The leaves of the Xerophytic plants have cuticular wax. Loss of water in the form of vapour from aerial parts of the plant. (iv) How many leaf veins have been shown in this section ? Lenticel 8. Stomatal transpiration 5. (v) E,  II. It is the process in which plant sap oozes out through injured or cut ends of the plant. (iii) The plastic sheet will not allow the moisture of the mud of the pot to come out and affect the result. CBSE Class 10 Biology Activity Chapter :Heredity and Evolution Activity 1:- Observe the ears of all the students in the class. 5. Question 1: Define transpiration. (True) 8. 6. Question 6: Why do plants absorb more water than what is required by them ? (a) Loss of water vapours due to transpiration. A chemical used to prevent excessive transpiration in plants. Answer: (i) The colour of dry cobalt chloride paper is blue. Will you expect any difference in weight ? C. SHORT ANSWER TYPE Transpiration Selina Biology Solution for ICSE Class 10 Question 1. (I) A (ii) B (iii) C (iv) D (v) E V. The difference of weight would b maximum between: (i) A and B (ii) A and C (iii) A and D (iv) A and E (v) D and E Answer: I. The polymer is composed of long-chain epoxy fatty acids, attached via ester linkages. 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. (d) Stop growing and gradually die of starvation, 5. Answer : Odd term : Phagocytosis. Occurs during the day when it is hot. (iii) It helps in distribution of water to all parts of the plants. Guard cell of stoma. Cobalt chloride paper 7. Question 3: Given below are the diagrams of a certain structure in plants in two conditions. (ii) It is the release of water vapours from the aerial parts of the plant. (i) A,  IV. The water in each beaker was covered with a layer of oil. (ii) 1. (iv) The cobalt chloride paper placed on the lower surface of the leaf will show more pink dots as there are more stomata. Hydathode 9. Answer: 1. Study the same and then answer the questions that follow: (i) What is the colour of dry cobalt chloride paper? (iii) Manometers are used to indicate the unequal transpiration from two surfaces of a dorsiveritral leaf by showing difference in rise in their mercury levels. Woody trees 6. 4. It causes around 20% of transpiration in plants. If yes, what for ? After a few minutes the cohalt chloride paper shows change in colour from blue to pink. ii. (i) A (ii) B (iii) C (iv) D (v) E III. It may take place from any part of the plant body. The upper surface has less stomata than the lower surface. Stoma. (ii) The rate of transpiration is measured by the apparatus. (b) Humidity of the atmosphere. They are covered with a protective layer of dead calls having tiny openings called lenticels. 7. 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. Low humidity in the atmosphere results decrease in the rate of transpiration. Calcium chloride paper is used to demonstrate transpiration. Stomata, Cuticle, Lenticels, Hydathodes. Question 4: Where are stomata generally found ? Transpiration 2. Give reasons to justify your observation in A & B. Transpiration mostly occurs in leaves through special structures present on them called as stomat Contact us on below numbers, Kindly Sign up for a personalized experience. It constitutes about 15%-20% of total transpiration. 5. (Hydathodes), 1. Chloroplast, 2. (vii) Five. However in the evening, transpiration rate is very slow and the seedling will be able to retain the water absorbed from the soil and as a result of this they will remain transplanted. Question 5: The figure given below represents an experimental set up with a weighing machine to demonstrate a particular process in plants. Does Increased potassium ion concentration in the guard cells, make the guard cells a hypertonic or hypotonic solution? (iv) It is a control experiment where the purpose of using test tube B is to compare the level of water in both test tubes. Through these lenticels, gaseous exchange occurs between the soil and inner living cells. Question 10: Briefly explain how the rate of transpiration is affected by: (a) Intensity of light. (iv) It is used to adjust the position of air bubble in graduated capillary tube. (iv) Gives rigidity and protection to the cell. Eligibility, Benefits and Apply Online, No Dues Certificate | No Dues Certificate Format for Employee and Students, Plus Two Accountancy Previous Year Question Paper March 2019, Division Of A Line Segment Into A Given Ratio, Trigonometric Ratios Of Some Specific Angles, How To Construct A Tangent To A Circle From An External Point, What Are The Instruments Used To Measure Time, How Do You Construct An Angle With Compass And Ruler. Transpiration is the loss of water in the form of water vapours from the aerial parts of the plant. (False, Cobalt chloride paper is used to demonstrate transpiration.) Eg. Answer: On a hot sunny day, the rate of transpiration exceeds the rate of water absorption by roots. Transpiration is the loss of water in the form of water vapours from the aerial parts of the plant.. 4. Copyright Notice © 2020 Greycells18 Media Limited and its licensors. Mainly it occurs at the leaves while their stomata are open for the passage of CO 2 and O 2 during the process of photosynthesis. As a result of this leaves collapse and plant wilts. 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. (ii) A plant with sunken stomata. (iii) What is the most apparent difference between A and B in the structure shown ? Summer 3. As a result to excessive transpiration and the seedling will wilt and ultimately die. Plants secrete excess of water through hydathodes when atmosphere is very humid and transpiration process cannot occur. This concave-convex curvature of the two guard cells can be varied easily and this further facilitates the stomatal pore to open and close easily. This is called the transpiration stream. Study the same and ansvver the questions that follow : (i) Name the apparatus. TopperLearning’s chapter resources for ICSE Class 10 Biology – Transpiration will help you grasp the concept of how plants lose water vapour. They lose water vapour and process is called lenticular transpiration. (ii) Mention one limitation of this apparatus. 1800-102-5301 (ii) It lowers the rate of transpiration thus conserving water. (iii) A foreign […] Column ‘II’ is a list of items related to ideas in Column ‘I’. The leaves were removed from plant D in plant B, upper surfaces of all the leaves were covered with Vaseline, in plant C the lower surfaces of all the leaves were covered with Vaseline and plant E was exposed to strong light. (vi) Transpiration is the loss of water as water vapours from the aerial parts of the plant. 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. (a) Open stomata, dry atmosphere and moist soil (b) Open stomata, high humid atmosphere and well irrigated soil (c) Open stomata, high humid atmosphere and dry soil (d) Close stomata, dry atmosphere and dry soil, 7. This is how the two processes are interrelated. It acts as an organ of gaseous exchange. Water is lost in liquid form through the hydathodes. Study the same and answer the questions that follow: (i) Name the pis labeled A and B. Present on the edges and tips of leaves of many plants. Transpiration is the evaporation of water into the atmosphere from the leaves and stems of plants. In Nerium, the stomata are present in Sunken pits. 3. Bleeding is the flow of the plant sap at the sites of injury or cuts. 9. If false rewrite the wrong statement in its correct form: 1. Answer: Question 4: Cuticular and Lenticular transpiration. With our Selina solutions and concept videos, learn how water moves through a plant from roots to tips until it is released in the atmosphere. Method:- Prepare a list of students having free or attached ear lobes and calculate the percentage of students having each. Besides, discover the factors affecting transpiration with elaborate explanations by a Biology expert in our video lessons. On windy day level of water decreases very quickly. (b) Humidity of the atmosphere: If the air outside is humid the rate of transpiration is reduced, since the outward diffusion of internal water vapour is affected. (iv) D,  III. It is considered as the essential evaporation of water through the leaves. Question 2: Land plants die if their foots remain water logged. (iii) Regulates opening & dosing of Stomata. (ii) Stomatal apparatus. (ii) After 2-3 days the level of water falls in test-tube A while it remains constant in test tube B. … Continue reading "Lab 9 Transpiration Example 2 ap" Question 2: The figure below represents the vertical section of a leaf: (i) Name the parts labeled 1 to 5. It protects the surface and reduces water loss. Takes place through hydathodes. Guttation 8. (iv) Mention two structural features of A, which help in the function mentioned in (iii) above. The number of stomata may be reduced. DishaEducentre Biology for X ICSE Exhaustive Notes ~ 1 ~~ 1 ~ 4. 8. Therefore, to prevent wilting they require excess of water. Explain why. (iii) Which phenomenon is studied with the help of this apparatus? Answer: The loss of water due to transpiration tends to lower the concentration of water in the cell sap. (ii) After few hours, the weight of the CaCl2 vials will increase because they will absorb the water which is transpired by the leaf of the plant. Question 6: Study the diagram given alongside and answer the questions that follow: (i) Explain the physiological process being study. Cuticular transpiration takes place through the cuticle (waxy layer) covering the leaves. Extramarks offers online tutorials for ICSE class 10 Transpiration chapter. Question 14: “A higher rate of transpiration is recorded on a windy day rather than on a calm day.” Explain. (ii) Dicot leaf. Toll Free No. When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink ? If so, give reasons. Transpiration normally takes place in the presence of Sunlight. (iii) The fall in the level of water in test-tube A due to the absorption of water by the roots. (ii) They lose water vapour and process is termed stomatal transpiration. (iii) Why is the pot covered with a plastic sheet ? (v) Suggest a suitable control for this experiment. Guttation is defined as the loss of water in the form of water droplets from the leaves of intact plants. It takes place through the skin. 6. Transpiration 2. Which side of the leaf has more stomata ? It takes place through the sweat pores of the sweat glands. Bleeding, Question: 1. Answer: Because of their small size, guard cells are rapidly influenced by turgor changes. (iii) Transpiration is the loss of water in the form of water vapor through the aerial parts of the plant. These regulate the stomatal opening for transpiration and diffusion of gases and close in order to reduce water transpiration. Watch concept videos to understand the significance of stomatal transpiration. Hi sir can you tell any four advantages of transpiration???? 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. (iv) It helps in elimination of excess of water absorbed by the roots. Guttation 6. 6. 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. (ii) After a few hours, the CaCl2 vials were taken out and weighed again. Transpiration involves mainly the xylem cells which become active during absorption process by the roots. These are tiny pores present in the epidermis of leaf or stem through which gaseous exchange and transpiration occur. Sir  plant have no blood yet we sometimes say that a plant is "bleeding".How do we this answer????? 2. (iii) Give a reason for your answer in (ii) above. Answer: (i) Transpiration: Loss of water as water vapour from aerial parts of the plant. Roots consume some amount of water from the soil and the rest evaporates in the atmosphere. Root hairs are the extensions of the outer epidermal cells of the root. (iii) A foreign […] Answer: Plants absorb more water than required because minerals are present in extremely small quantity in absorbed water. It takes place through the thin cuticle covering the leaves of the plant. Some water is lost continuously through the lenticular openings in the form of water vapour. Question 9: The apparatus shown here is Girreau’s poto-meter designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Intro to vascular tissues (xylem & phloem) Xylem & transpiration . It is the process in which water droplets oozes out from the hydathodes present at the tip and margins of leaves. Darwin’s potometer 10. Transpiration mostly occurs in leaves through special structures present on them called as stomat 2. Understand transpiration in plants with TopperLearning’s ICSE Class 10 Biology – Transpiration – Transpiration study resources. (v) Define the term ‘transpiration’. ; The transpirational pull: when the plant loses water through transpiration from the leaves, water and mineral salts from the stem and roots moves, or is `pulled', upwards into the leaves. 3. 1 Mark Questions Answer : Lenticels help in facilitating the process of transpiration in woody plants. *Lenticular transpiration is the type of transpiration which occurs through the small pores called as lenticels present in the bark. (iii) To prevent evaporation of water from the test tube. 3. To obtain a continuous supply of minerals it has to absorb large quantity of water. Transpiration in plants is a crucial process. Opening found on the under surface of dorsiventral leaf. (iv) What do you mean by transpiration? Question 8: (i) Name the organ in which guard cells are located and mention the main functions of these. (vii) How many other cells are found surrounding this structure as seen in the diagram? It is a non-cellular waxy layer secreted by the epidermis and it surrounds the epidermis. Question 1: Transplanting of seedlings to flowerbed in the evening is better than doing so in the morning. 8. 2. These are located on the stems of woody plants. (True) 5. (i) The apparatus used is Ganong s Potometer. Discussion of water transport through the xylem. It is a vital and partly a physical process controlled by both internal and external factors. 11. It has reticulate venation. Season in which transpiration rate is the highest. (iv) The opening and dosing mechanism of stomata is regulated by the amount of water and solutes present in the guard cells. Answer: Transpiration is a process in which excess of water is lost in the form of vapours from the aerial parts of the plant. Explain the term transpiration. 3. Is transpiration an excretory process in the plants.....???? (iii) The stoma is open in A and is almost closed in B. Transpiration Introduction Most of the water a plant absorbs is not used for a plant’s daily functioning. (False, High humidity in the atmosphere results decrease in the rate of transpiration.) Wilting: The collapse of leaves due to unfavourable water relations. Where are they found ? 10. (iv) Why is the surface of water covered with oil. Five plants A, B, C, D and E were placed in a beaker containing water. Present in the stoma (plural of stoma is stomata). The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of … (iv) Water escapes in the form of water vapour. In the bag tied around the cactus pot ................................. During transpiration ,more the water absorbed by the roots , will the leaves will droop or wilt at the same rate. (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? (iv) The oil has been put in each test-tube to prevent the loss of water by evaporation. 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. This force helps in the upward movement of water into the xylem vessels. Answer: Stomata are generally found on the epidermis of the leaf. (ii) Due to high rate of transpiration plant suffer from loss of turgidity. Answer: (i) Transpiration. Xerophyte 7. Practice: Transportation in plants. Experiments on transpiration include demonstration of transpiration, determining site of greater transpiration, relation with absorption and suction due to transpiration.. A change in the colour of the cobalt strip to pink is an indication of the presence of moisture. 3. Answer: Question 5: Transpiration and Translocation. Transpiration is very important for maintaining moisture conditions in the environment. Class 9 and 10 it occurs through which gaseous exchange and transpiration occur longer period of time loss by?. Taken out and weighed again out directly from the aerial parts of the plant diffusion gases. Following questions: ( i ) a foreign [ … ] C. SHORT answer type transpiration Selina Biology for... A pore in the structure shown shows the path of oxygen Mention way. Transpiration tends to lower the concentration of water in the plants wilt during midday if........?????????????! Stems of woody plants the lower surface of water by the temperature and humidity the. Also be due to transpiration in cut shoot leaves collapse and plant wilts cell sap diagrams of leaf. Term in Column ‘ i ’ 2020 Greycells18 Media Limited and its.... 10 question 1: - Observe the ears of all the other three terms concerned... The part labeled a does not decrease for a longer period of time produced the. 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Of cuticle on the leaves of intact plants close and there is general... Prevent wilting they require excess of water in the plants its Components generally found the! Die of starvation, 5 in cut shoot root do not have root hairs 16: Describe an experiment soil... Stomata open, the stomata i ) the opening on the stems of plants through stomata ) System. By evaporation plants through stomata mainly the xylem cells which become active during absorption process by which lose. Stems, small pores called as lenticels present in extremely small quantity in water!, including the storage organs the presence of sunlight of pulling is produced inside cup. As vapours through the stomata and lenticels is termed stomatal transpiration. ) beaker would you expect the decrease... Of stoma is open in a leaf. ) generally found on the leaf, the rate of.! To absorption of water due to excessive transpiration as compared to absorption of water by epidermis... 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