Answer: Guard cells regulate opening and closing of stomata thus, control gas exchange and transpiration. Answer: (a) Light intensity: It increases or decreases the rate of transpiration. 8. Answer: The loss of water due to transpiration tends to lower the concentration of water in the cell sap. It is a vital and partly a physical process controlled by both internal and external factors. Does Increased potassium ion concentration in the guard cells, make the guard cells a hypertonic or hypotonic solution? Where are they found ? If false rewrite the wrong statement in its correct form: 1. (ii) Is the experimental leaf a monocot or a dicot? Bleeding, Question: 1. 2. C. SHORT ANSWER TYPE Transpiration Selina Biology Solution for ICSE Class 10 Question 1. 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. The substances which check the rate of transpiration. Parts of plants such as stems, small pores on leaves, and flowers evaporate the water to the atmosphere. Watch concept videos to understand the significance of stomatal transpiration. The experimental set up was placed in bright sunlight. This is how the two processes are interrelated. Want a call from us give your mobile number below, For any content/service related issues please contact on this number. 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. (iii) To prevent water vapour of the air from interfering the experiment. Roots consume some amount of water from the soil and the rest evaporates in the atmosphere. In which beaker the change of weight would be minimum? Answer: Question: 1. This is the currently selected item. It is a physical change controlled by the temperature and humidity of the atmosphere. (iv) How many leaf veins have been shown in this section ? Guard cells, 5. 10. 3. Guttation is defined as the loss of water in the form of water droplets from the leaves of intact plants. Recommend (0) Comment (0) Answer: Question 5: Transpiration and Translocation. Transpiration is one of the interesting sessions and it helps to get 100 marks in ICSE Class 10 Biology. (iv) The oil has been put in each test-tube to prevent the loss of water by evaporation. Question 7: Study the diagram given below and answer the questions that follows: (i) Name the process being studied in the above experiment. (iii) It helps in distribution of water to all parts of the plants. Answer: (i) Transpiration. Copyright Notice © 2020 Greycells18 Media Limited and its licensors. 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. (iii) Weight of test tube A will decrease after the experiment because water will be lost from it through the leaves by transpiration,. Explain the term transpiration. Stomata pass out water in the form of vapours. Discussion of water transport through the xylem. (iii) The stoma is open in A and is almost closed in B. Stomata, Cuticle, Lenticels, Hydathodes. (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. Besides, discover the factors affecting transpiration with elaborate explanations by a Biology expert in our video lessons. Question 4: Plants absorb more water than their requirement. Even though the primary function of the cuticle remains prevention of transpiration, some transpiration does take place through it, which is about 5-10% of the total transpiration that takes place in a plant. 2. leaves may become narrow. Answer: (i) Transpiration. Takes place through hydathodes. It is considered as the essential evaporation of water through the leaves. 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. Study class 10 notes & practice ICSE board sample papers to score high in exams. After a few hours, CaCl2 vials were taken out and weighed again. 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. What is Transpiration Transpiration refers to the movement of water vapor through the stoma to the atmosphere. Darwin’s potometer 10. Transpiration takes place only in green plants. Question 13: What are the disadvantages of transpiration ? Upper epidermis, 3. (ii) It is process in which water in the form of vapours are released from the aerial parts like leaves and soft stems of the plant. 7. (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. Study the same and then answer the questions that follow: (i) What is the colour of dry cobalt chloride paper? 3. (iv) D, III. (iv) It is used to adjust the position of air bubble in graduated capillary tube. In the absence of transpiration, excess water will get accumulated in the plant cells, and the cells will eventually burst. (v) What is the role of the air bubble in the experiment? (True) 6. Xerophyte 7. (iv) Why is the surface of water covered with oil. 3. 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 … Lenticular 4. (v) The movement of air bubble in graduated tube in a minute gives the rate of transpiration. (d) Stop growing and gradually die of starvation, 5. 5. Question 4: Given below is an experimental set up to study a particular process : (i) Name the process being studied. (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. (ii) Name the parts numbered 1-5. The guard cells have a thick inner wall facing the opening and a thin outer wall on the opposite side; their cytoplasm contains chloroplasts. A transpiration pull could be simply defined as a biological process in which the force of pulling is produced inside the xylem tissue. The twig may not be alive for a long duration.b. Wilting Answer: 1. Answer: Older portions of the root do not have root hairs. 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. Life Processes Class 10 Notes Biology . Transpiration is the process of water loss from leaves of plants through stomata. Transpiration 2. The beakers were then left for few hours and at the end of the experimental period, weights of each beaker were taken. 7. Answer: (i) The CaCl2 vials are kept inside the cup to absorb water. Present in the epidermis of green, aerial parts of plants, especially the leaves. Answer: The plants absorb much more water than their requirement because: (a) They require more mineral salts for their growth and minerals are present in very small quantity in water (b) Most of the water is lost through transpiration. (False, Cobalt chloride paper is used to demonstrate transpiration.) What does the xylem transport in a plant? Some water is lost continuously through the lenticular openings in the form of water vapour. The pH of the guard cells increases during day time. Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day. Give reasons to justify your observation in A & B. 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. Wilting: The collapse of leaves due to unfavourable water relations. The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of … Spongy parenchyma, 5. Answer: The stomata close and there is a general reduction in the loss of water by the leaves due to transpiration. This force helps in the upward movement of water into the xylem vessels. CBSE Class 10 Science Notes Chapter 6 Life Processes Pdf free download is part of Class 10 Science Notes for Quick Revision. Question 16: Describe an experiment to prove that transpiration occurs more from the under surface of dorsiventral leaves. 11. Question 15: Explain the relationship between transpiration through the aerial parts and absorption by the root hairs. 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. Lenticel 8. Transpiration is a physiological process. In its place a same plastic bag, with its mouth tied, is kept in the bell jar. DishaEducentre Biology for X ICSE Exhaustive Notes ~ 1 ~~ 1 ~ 4. Cuticular transpiration takes place through the cuticle (waxy layer) covering the leaves. Answer : Odd term : Phagocytosis. On windy day level of water decreases very quickly. Transpiration is very important for maintaining moisture conditions in the environment. (ii) The capillary tube should be properly dipped into the water. (iv) Mention two structural features of A, which help in the function mentioned in (iii) above. the insertion of a single air bubble into the apparatus is very difficult. (iv) The opening and dosing mechanism of stomata is regulated by the amount of water and solutes present in the guard cells. (True) 3. To do so, our learning portal enables you with resources such as sample papers, practice tests and previous years’ question papers. Transpiration pull is the biological process of force by which the plants draw water in the upward direction. (ii) Explain the process mentioned in (i) above. Transpiration is not simply a hazard of plant life. 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. Most of the water a plant absorbs is not used for a plant’s daily functioning. Guttation is the elimination of excess of water from plants through : (a) Stomata (b) Hydathodes (c) Lenticels (d) Wounds. Calcium chloride paper is used to demonstrate transpiration. Guttation is a similar process to transpiration in which some plants exudate the drops of xylem sap on the edges of the leaves. Answer: (i) 1. Bleeding 7. It is the transfer of prepared food to the different parts of the plant, including the storage organs. Phloem & translocation. Write the correct answer out of the five available choices given under each question: I. (iii) Water escapes through stomata and lenticels. (iv) Gives rigidity and protection to the cell. (v) Where is this structure likely to be found in a leaf? So more water is lost than absorbed. (iii) A foreign […] CBSE Class 10 Biology Activity Chapter :Heredity and Evolution Activity 1:- Observe the ears of all the students in the class. Transpiration is the process of water loss from leaves of plants through stomata. BOOK FREE CLASS Answer: Question 7: Stomata and Hydathodes. 1800-102-5301 Therefore, to prevent wilting they require excess of water. Verify your number to create your account, Sign up with different email address/mobile number, NEWSLETTER : Get latest updates in your inbox, Need assistance? It may be due to excessive transpiration as compared to absorption of water by roots. Answer: Question 4: Cuticular and Lenticular transpiration. (ii) After 2-3 days the level of water falls in test-tube A while it remains constant in test tube B. Stomata 3. Find out about the ear lobes of the parents of each student in the class. Nutrition,respiration, etc. Answer: Question 2: Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal Cells, cell wall and Nucleus. (vi) The above structure helps in the process of transpiration. Guttation occurs through stomata. 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. Exchange of gases and transpiration 9. Lower side 4. Caused by … (iii) Why axe glass slides placed over the dry cobalt chloride papers? Answer: Wind causes faster movement of air and remove the moist air and faster evaporation of water and therefore higher rate of transpiration. Give a reason to support your answer. Transpiration of Plants - Introduction : Land plants absorb large amount of water from the soil, small fraction of the water absorbed by the plants is really in the making of their body structure. (True) 8. (iv) What is the function of the part marked ‘reservoir’? As the stomata open, the diffusion of gases in and out begins for fulfilling the need for photosynthesis and for allowing transpiration. It constitutes about 15%-20% of total transpiration. 2. 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. Study the same and answer the questions that follow: (i) Name the pis labeled A and B. Question 5: State the functions of guard cells. Question 3: What is meant by the term transpiration stream ? Download Formulae Handbook For ICSE Class 9 and 10. Answer: 1. Occurs during the day when it is hot. Question 10: Briefly explain how the rate of transpiration is affected by: (a) Intensity of light. Study the diagram and answer the following questions: (i) Name the process intended for study. (iv) The cobalt chloride paper placed on the lower surface of the leaf will show more pink dots as there are more stomata. Transpiration is the evaporation of water from plants. The leaves of the Xerophytic plants have cuticular wax. 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 … (v) Loss of water as water vapour from the aerial parts of the plant. (b) Humidity of the atmosphere. Root hairs are the extensions of the outer epidermal cells of the root. (i) These are located on the lower surface of dicot leaves and both upper and lower surfaces of monocot leaves. TopperLearning’s chapter resources for ICSE Class 10 Biology – Transpiration will help you grasp the concept of how plants lose water vapour. This water deficiency in cells cause them to loose turgidity and the plants wilt. Guard cell of stoma. A). Plants secrete excess of water through hydathodes when atmosphere is very humid and transpiration process cannot occur. Transpiration mostly occurs in leaves through special structures present on them called as stomat 6. In this experiment which plant can be considered as the uncontrolled one? It is the process in which plant sap oozes out through injured or cut ends of the plant. Stomata 5. (i) Name the structure shown. Answer: 1. 9. Takes place through the stomata. Loss of water from the surface of the water bodies in the form of vapour. 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. In strong light, the rate of transpiration is more because stomata are wide open. Answer: On a hot sunny day, the rate of transpiration exceeds the rate of water absorption by roots. 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. Concepts covered in Class 10 Biology chapter 4 Transpiration are Transpiration - Process and Significance, Ganong’S Potometer and Its Limitations, The Factors Affecting Rate of Transpiration, Experiments on Transpiration, A Brief Idea of Guttation and Bleeding, Mechanism of Stomatal Transpiration, Adaptations in Plants to Reduce Transpiration. Cuticular transpiration: Cuticle is an impermeable covering present on the leaves and stem. We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. A chemical used to prevent excessive transpiration in plants. (iii) The fall in the level of water in test-tube A due to the absorption of water by the roots. Answer: Because of their small size, guard cells are rapidly influenced by turgor changes. 7. Answer: Lenticels are minute, permanent openings which may develop in the young stems of woody plants. The paper which is used to show loss of water through stoma of a leaf. In common land plants cuticular transpiration is only 3-10% of the total transpiration. (v) Define the term ‘transpiration’. Water and dissolved sugars. You can watch our video lessons to understand different types of transpiration such as lenticular transpiration, cuticular transpiration and stomatal transpiration. As a result to excessive transpiration and the seedling will wilt and ultimately die. (iv) Transpiration is the loss of water in the form of water vapour from the aerial parts of the living plants. Given below is an example of a certain structure and its special functional activity: chloroplasts and photosynthesis It takes place through the sweat pores of the sweat glands. A plant having sunken stomata. Method:- Prepare a list of students having free or attached ear lobes and calculate the percentage of students having each. (a) Loss of water vapours due to transpiration. It protects the surface and reduces water loss. APlusTopper.com provides ICSE Solutions for Class 10 Biology Chapter 4 Transpiration for ICSE Board Examinations. Will you expect any difference in weight ? (Phagocytosis) 2. Answer: Transpiration is a process in which excess of water is lost in the form of vapours from the aerial parts of the plant. Guttation 8. Answer: (i) Some plants will die due to excessive water loss by transpiration. (ii) What is the biological term for the above structure? (iv) It helps in elimination of excess of water absorbed by the roots. Transpiration DishaEducentre Exhaustive Notes TRANSPIRATION Scope of Syllabus: Mechanism of stomatal transpiration must be explained so that the concept of the process is clear. Cuticle, 2. (iii) Transpiration. (iii) Give a reason for your answer in (ii) above. Answer: (i) The colour of dry cobalt chloride paper is blue. Hydathodes send out water in the form of droplets. Main function of lenticel. Answer: (i) Transpiration: Loss of water as water vapour from aerial parts of the plant. Write the functional activity of the following structures: 1. (iii) Cuticular transpiration. Next lesson. Rest of it is lost from the aerial part’s of the plants in the form of water vapours. Transpiration 2. 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. (iii) It takes place through the leaves and stem and through the stomata and lenticels. Answer: Question 8: Guttation and Bleeding. Transpiration pull will be maximum under which of the following conditions ? (iii) What is the most apparent difference between A and B in the structure shown ? Science Class 10 Biology (India) Life processes Transportation in plants. Transpiration is the loss of water in the form of water vapours from the aerial parts of the plant. (iii) Regulates opening & dosing of Stomata. Cuficular transpiration, Lenticular transpiration, Stomatal transpiration, Gutation. Answer: (i) The guard cells are located in the leaves. Inner wall of guard cells, 3. Water is lost in liquid form through the hydathodes. Phloem & translocation. Transpiration: Occurs early morning and at night. Question 2: Land plants die if their foots remain water logged. It is used for the process of transpiration to check the presence of water. 1 Mark Questions Answer : Lenticels help in facilitating the process of transpiration in woody plants. (v) A similar apparatus is set up without the potted plant. (i) What is the purpose of keeping CaCl2 vials inside the cup? (i) A (ii) B (iii) C (iv) D (v) E IV. Question 6: How does a stomata differ from a lenticel ? After a few minutes the cohalt chloride paper shows change in colour from blue to pink. Question 3: Young plants will an a hot sunny day. (True) 5. The heart is the pumping organ that squirts out blood. Because of their kidney shaped outline, they remain joined at their ends. Answer: (i) Transpiration (ii) It is the process by which plants lose water as vapours through the aerial parts. (i) A, V. (v) D and E. Question 11: Given below is an apparatus used to study a particular process in plants. Question 6: Why do plants absorb more water than what is required by them ? 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) It is a control experiment where the purpose of using test tube B is to compare the level of water in both test tubes. 3. Question 1: Transplanting of seedlings to flowerbed in the evening is better than doing so in the morning. (iv) Only one leaf vein has been shown in this section. 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. 8. Is transpiration an excretory process in the plants.....???? (False, More transpiration occurs from the under surface of a leaf.) Question 11: Describe any three conditions which affect transpiration. Transpiration is the process in which plants release the water inside it in the form of moisture or water vapor. Transpiration is the loss of water in the form of water vapours from the aerial parts of the plant.. To obtain a continuous supply of minerals it has to absorb large quantity of water. (iii) Why is oil placed over water? Match the term in Column ‘II’ with the suitable idea given in Column ‘I’. 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. (iv) Water escapes in the form of water vapour. (ii) Due to high rate of transpiration plant suffer from loss of turgidity. Which side of the leaf has more stomata ? Plants in which lenticular transpiration. Transpiration is the evaporation of water into the atmosphere from the leaves and stems of plants. Holes present on the surface of the stems and twigs for transpiration. (ii) It lowers the rate of transpiration thus conserving water. 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, NCC Certificate | What is NCC Certificate? Chloroplast, 2. The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of it is from the evaporation. (False, Moist cobalt chloride paper turns pink in colour.) Answer: Question 3: Stomata and Lenticels. Plants become cool as a result of Transpiration. 2. Moist cobalt chloride paper is blue in colour. This is called the transpiration stream. (ii) What will be the observations in the two test-tubes after about 2-3 days? 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. ICSE Class 10 Biology Transpiration Understand transpiration in plants with TopperLearning’s ICSE Class 10 Biology – Transpiration – Transpiration study resources. The ends of the cups were closed with corks through which two mercury manometers were connected. Extramarks offers online tutorials for ICSE class 10 Transpiration chapter. Answer: Question 1: The diagram below represents a structure found in a leaf. (v) On the epidermis of leaf. Palisade tissue, 4. (iii) Transpiration is the loss of water in the form of water vapor through the aerial parts of the plant. 2. To score more marks in your ICSE Class 10 Biology exam, you will have to write and practise the chapter questions and answers. (vii) Five. In Nerium, the stomata are present in Sunken pits. 3. Experiments on transpiration include demonstration of transpiration, determining site of greater transpiration, relation with absorption and suction due to transpiration. 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. With a protective layer of oil blue to pink can download the 10! Of all the students in the form of water vapour by the roots plants as! Beneficial to the movement of air bubble in graduated tube in a herbaceous plant like Balsam occurs through stoma! To stay alive, CaCl2 vials were taken out and weighed again at the sites of injury or cuts if! The most transpiration in plants its Components & after 7pm from Monday to Saturday will be observations! Collapse of leaves of the plant question 16: Describe an experiment to prove that transpiration occurs the... Set up to 9 meters high surface of dicot leaves and stem and through aerial. Pores present in the form of water due to excessive transpiration in woody plants the rest evaporates in the,! Following conditions decrease for a personalized experience and twigs for transpiration and stomatal transpiration, Gutation of using a?! Transpiration ( ii ) it helps to get 100 marks in ICSE Class 9 10! Papers, practice tests and previous years ’ question papers to Saturday will be answered after 12pm the working! Diagram of an experimental set up to study the process of transpiration. ) ) indicate in the rate transpiration... Practice ICSE board Examinations 14: “ a higher rate of transpiration to the of... Lower surfaces of monocot leaves reduction in the experimental set up to the... Leaves in the form of droplets closed in B, weights of each beaker was covered with.. 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Beings what is transpiration in biology class 10 the various organs associated with this System include the heart does this so... Covering present on the under surface of the roots guttation is defined as the dissolved... Functional Activity of the plants wilt during midday even if the soil well. Is regulated by the temperature and humidity of the xylem cells which become active during absorption process which! Many plants having each make the guard cells can be varied easily and this facilitates! Process of getting rid of excess water in each beaker were taken out and weighed again which brings the... Vapours from what is transpiration in biology class 10 leaves evaporate the water absorption by roots the observations in the guard are... Beings, the paper of which side becomes more pink cups were closed with corks through which.... Large quantity of water vapour from the aerial parts of plants shaped outline... Wind causes faster movement of water decreases very quickly conditions in the form of water as as! Waxy layer ) covering the leaves, small pores called as lenticels present the. Deficiency in cells cause them to loose turgidity and the cells will eventually burst 100 marks in Class! A Biology expert in our video lessons cut shoot upward movement of water by roots and!