2. Question 1 Name the two conducting tissues of plants? Plants in which lenticular transpiration. explain. Answer: Question 7: Stomata and Hydathodes. Question 6: Why do plants absorb more water than what is required by them ? 4. (ii) In the day time dotted arrow shows the path of CO2 while solid arrow shows the path of oxygen. 5. Experiment to demonstrate the transpiration phenomenon with the bell jar method: ADVERTISEMENTS: Requirements: Bell jar, well-watered potted plant, rubber sheet, glass plate, Vaseline. 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 . In botany, transpiration pull refers to the suction, force, or pull that draws water up through a plant. (iv) What do you mean by transpiration? It takes place through the skin. (ii) The capillary tube should be properly dipped into the water. The movement of water out of the leaf stomata creates, when the leaves are considered collectively, a transpiration pull. Give a reason to support your answer. Question 3: What is meant by the term transpiration stream ? Lower side 5. List out the significance of transpiration in plants. 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. 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. Transpiration is defined as the evaporation of excess water from the stomata present in the leaves of plants. Complete the following sentences with appropriate words : 1. (iii) Why axe glass slides placed over the dry cobalt chloride papers? 8. Transpiration Pull. (iii) It takes place through the leaves and stem and through the stomata and lenticels. Question 3: Given below are the diagrams of a certain structure in plants in two conditions. 3)what do you mean by transpiration pull? A chemical used to prevent excessive transpiration in plants. 2. 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. 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. a. Transpirational theory was proposed by Dixon and Jolly. 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. It may also be due to blocking of the xylem elements, pathogens or parasites. (ii) What is the biological term for the above structure? Present on the edges and tips of leaves of many plants. Transpiration pull theory is the proposed mechanism by which trees draw water through their roots. Multiple Choice Type Question 1: Absorption of … This loss of water in the leaves exerts a pull on the water in the xylem ducts and draws more water into the leaf. (iii) Water escapes through stomata and lenticels. (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 guard cells have a thick inner wall facing the opening and a thin outer wall on the opposite side; their cytoplasm contains chloroplasts. Question 2: Land plants die if their foots remain water logged. Chapter 3 Absorption by Roots- The Process Involved Questions Answers Class 10 Biology 03 Dec, 2020 0 Comments. Answered What do you mean by transpiration? (iii) To prevent water vapour of the air from interfering the experiment. (iv) Describe the mechanism which brings about the change in the structure depicted in A and B. (ii) Explain the process named in (i) above. When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink ? Water escapes from the hydathodes on the margin of the leaves in the form of water droplets. (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. Bleeding is the flow of the plant sap at the sites of injury or cuts. Palisade tissue, 4. 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. 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. Loss of water from the aerial parts of a plant. Transpiration occurs when the leaves of a tree allow water to exit into the air by means of tiny holes called stomata. No water drops will appear in the bell jar. 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. Cobalt chloride paper 7. Transpiration, in botany, a plant’s loss of water, mainly though the stomates of leaves. Cuticular transpiration takes place through the cuticle (waxy layer) covering the leaves. It is a vital and partly a physical process controlled by both internal and external factors. The ends of the cups were closed with corks through which two mercury manometers were connected. Give a reason to support your answer. Course. Question 9: The apparatus shown here is Girreau’s poto-meter designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. It is the loss of water in the form of water vapour from the aerial organs of the plant. Guttation takes place generally at Night. (d) Stop growing and gradually die of starvation, 5. Answer: (i) Stomatal transpiration. 4)define cohesive and adhesive forces. Water molecules are cohesive. The theory states that water lost from mesophyll cells by transpiration. You can download the Class 10 Biology ICSE Textbook Solutions with Free PDF download option. (b) Humidity of the atmosphere. 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. (ii) It is the release of water vapours from the aerial parts of the plant. It is the process in which water droplets oozes out from the hydathodes present at the tip and margins of leaves. (By Loftfield) Water vapour holding capacity of air inc reased at high temperature, resulting the rate of transpiration increased. Question 6: How does a stomata differ from a lenticel ? (i) A (ii) B (iii) C (iv) D (v) E II. Guttation. Transpiration, Photosynthesis, Phagocytosis, Guttation. The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of it is from the evaporation. 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 … Answer: Question 6: Transpiration and Perspiration. Transpiration pull will be maximum under which of the following conditions ? (iv) What is the function of the part marked ‘reservoir’? Answer: Because of their small size, guard cells are rapidly influenced by turgor changes. Answer: The loss of water due to transpiration tends to lower the concentration of water in the cell sap. (iii) The fall in the level of water in test-tube A due to the absorption of water by the roots. Study the same and then answer the questions that follow: (i) What is the colour of dry cobalt chloride paper? 10. In Nerium, the stomata are present in Sunken pits. These regulate the stomatal opening for transpiration and diffusion of gases and close in order to reduce water transpiration. Question 11: Describe any three conditions which affect transpiration. 2. (iv) Mention one way in which this process is beneficial to the plant. (vii) How many other cells are found surrounding this structure as seen in the diagram? Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6. The pH of the guard cells increases during day time. Hydathodes 9. The 10% of the atmospheric moisture is contributed by the transpiration whereas the rest of it is from the evaporation. Woody trees 6. This phenomenon is known as transpiration pull. Another way to prevent getting this page in the future is to use Privacy Pass. Answer : Odd term : Phagocytosis. Answer: 1. In the air above, the moisture forms clouds and soon falls as rain. Some water is lost continuously through the lenticular openings in the form of water vapour. In this page, you can find CBSE Class 10 Science Chapter 6 Extra Questions and Answers Life Processes Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice complete. Guard cell of stoma. In leaves, some amount of water is used for photosynthesis and excess water is released into atmosphere through openings called as stomata. (ii) They lose water vapour and process is termed stomatal transpiration. Revise the purpose of a potometer with an appropriate diagram. 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. 8. (iii) Could you add one more arrow in the figure ? Nov 23,2020 - Define 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. 2. 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. It may be due to excessive transpiration as compared to absorption of water by roots. (True) 6. 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. Transpiration definition is - the act or process or an instance of transpiring; especially : the passage of watery vapor from a living body (as of a plant) through a membrane or pores. 3. Stomata, Cuticle, Lenticels, Hydathodes. Chapter 6 Life Processes Class 10 Science Important Questions and Answers PDF will help you in scoring more marks. 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 2. Answer: (i) 1. Explain the transpiration pull theory. The amount of water lost by plants over a period of time refers to … Transpiration 2. The absorbed … Question 4 Name the two kinds of cells of xylem? (True) 5. Transpiration takes place only in green plants. (iv) The oil has been put in each test-tube to prevent the loss of water by evaporation. Question 4: Where are stomata generally found ? Our Biology experts have provided answers for ‘True or False’ questions from your textbook with supporting reasons for each answer. Question 3 What is transpiration? (False, High humidity in the atmosphere results decrease in the rate of transpiration.) Silicon emulsions/phenyl mercuric acetate 8. Lower side 4. 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. Career. B) and the transpiration stops. (iv) 1. Spongy parenchyma, 5. 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 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. (ii) Due to high rate of transpiration plant suffer from loss of turgidity. Ascent of sap - definition Upward movement of absorbed water against the gravitational force upto top parts of plants is called as ascent of sap. (Light opens stoma) Plant 1 grew more in the fridge, than plant 4 did in a cupboard; Why? Lenticular transpiration takes place through the small openings in the corky tissue covering the stem. Also define transpiration pull. Transpiration occurs when the leaves of a tree allow water to exit into the air by means of tiny holes called stomata. 4. Exercise (A) Multiple Choice Type Question 1: Transpiration pull will be maximum under which set of the following conditions? Advantages of transpiration-Generates suction pull which can pull water to … Plants become cool as a result of Transpiration. This force helps in the upward movement of water into the xylem vessels. Because of their kidney shaped outline, they remain joined at their ends. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and … Question 5 Name the various cells through which water moves upwards to reach the leaves? asked Mar 17, 2018 in Biology by nikita74 (-1,017 points) plant physiology. Write the functional activity of the following structures: 1. Question 1: Transpiration and Guttation. After a few minutes the cohalt chloride paper shows change in colour from blue to pink. 9. This water evaporates by the process of transpiration. Wilting: The collapse of leaves due to unfavourable water relations. Lenticular 4. Answer: (i) The colour of dry cobalt chloride paper is blue. Write the correct answer out of the five available choices given under each question: I. Stomata 5. Discussion of water transport through the xylem. Answer: (i) It results in ascent of sap by creating a suction force. Upper epidermis, 3. A. Q 8. Transpiration Definition. Guttation Versus Transpiration. (True) 2. Cuticular transpiration 3. Question 7: Forest bring in the rain, transpiration is the cause. Experiment to show transpiration process: Procedure: (i) Take a healthy potted plant and cover the pot with the help of rubber sheet. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’. (ii) Transpiration helps to cool the plant, due to evaporation of water. (ii) Is the experimental leaf a monocot or a dicot? (vi) Transpiration is the loss of water as water vapours from the aerial parts of the plant. Transpiration is not simply a hazard of plant life. 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 is how the two processes are interrelated. How differently would the results have been if the plants were exposed to light? Transpiration is the loss of water in the form of water vapours from the aerial parts of the plant.. Get access to Selina Solutions for ICSE Class 10 Biology Chapter 5 Transpiration at TopperLearning. (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? Answer: Question 1: The diagram below represents a structure found in a leaf. Water is continually being lost from leaves by transpiration. Water is continually being lost from leaves by transpiration. (ii) It lowers the rate of transpiration thus conserving water. This is called the transpiration stream. Darwin’s potometer 10. 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. Bleeding 7. Thus, it proves that the rate of transpiration is greater from the under surface of dorsiventral leaves. It is also called exudation. (ii) Name the parts numbered 1-5. Alleen Test Solutions. (iv) D, III. 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. 2. 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. (iv) It helps in elimination of excess of water absorbed by the roots. IIT-JEE. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and Equations Chapter. Answer: Stomata are generally found on the epidermis of the leaf. Question 10: The following diagram is set up to demonstrate an experiment. It may take place from any part of the plant body. 6. 9. Exchange of gases and transpiration 9. The leaves of the Xerophytic plants have cuticular wax. Answer: Lenticels are minute, permanent openings which may develop in the young stems of woody plants. ICSE Solutions for Chapter 4 Transpiration Class 10 Biology. All the other three terms are concerned with processes in plants. Learn more about stomata and the guard cells that regulate their opening and closing. Lenticel 8. Define transpiration and explain why it occurs in plants. Subscribe … Since water is vital for plants, many of the fancy words relating to plants have to do with water. Answer: 1. 2)root hairs become flaccid,when fertilizers are added to the moist soil around it. This is called the cohesion-tension model of water transport. The questions involved in ICSE Solutions are important questions that can be asked in the final exam. The number of stomata may be reduced. Loss of water as droplets through leaves of an intact plant. The upper surface has less stomata than the lower surface. In strong light, the rate of transpiration is more because stomata are wide open. 3. They provide for the exchange of gases between the outside air and the air canals within the leaf. (ii) After a few hours, the CaCl2 vials were taken out and weighed again. Question 14: “A higher rate of transpiration is recorded on a windy day rather than on a calm day.” Explain. Answer: Question: 1. How to get Reseller Certificate? Does the cold temperature have anything to do with 26.10.2019 English Secondary School +50 pts. It is used for the process of transpiration to check the presence of water. You may need to download version 2.0 now from the Chrome Web Store. Answer: Transpiration rate in such plants is very high during mid day and exceeds the water absorption rate of the roots. 95% of the total transpiration takes place through Stomata. Column ‘II’ is a list of items related to ideas in Column ‘I’. Answer: (i) The guard cells are located in the leaves. (a) Loss of water vapours due to transpiration. It takes place through the sweat pores of the sweat glands. To obtain a continuous supply of minerals it has to absorb large quantity of water. Question 5: The figure given below represents an experimental set up with a weighing machine to demonstrate a particular process in plants. ; 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. Define transpiration. Answer: During day time transpiration rate is very high. It means by increasing 10 0 C temperature, the rate of transpiration is approximately double. The apparatus used to compare the rate of transpiration in cut shoot. The water in each beaker was covered with a layer of oil. Take a well-watered, healthy potted plant and cover the pot with the help of rubber sheet JEE MAINS JEE ADVANCED X BOARDS XII BOARDS NEET. The pull is created through water surface tension within the plant cells. absorption by root class 10 (biology) short questions 1)how is root hair structurally adapted for absorption of water from the soil? Question 6 What is translocation? Question 3: Young plants will an a hot sunny day. See more. Question 4 Name the two kinds of cells of xylem? Transpiration Definition. Therefore, to prevent wilting they require excess of water. Answer: On a hot sunny day, the rate of transpiration exceeds the rate of water absorption by roots. SOLUTION: What other factors might plants be affect by? Transpiration refers to the movement of water vapor through the stoma to the atmosphere. 5. Answer: Question 5: Transpiration and Translocation. As a result to excessive transpiration and the seedling will wilt and ultimately die. 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. Question 3: What is meant by the term transpiration stream ? (v) The movement of air bubble in graduated tube in a minute gives the rate of transpiration. (False, Cobalt chloride paper is used to demonstrate transpiration.) This water deficiency in cells cause them to loose turgidity and the plants wilt. Question 2 What is the function of transpiration? They lose water vapour and process is called lenticular transpiration. (iii) The plastic sheet will not allow the moisture of the mud of the pot to come out and affect the result. Mention, if the following statements are True or False. Transpiration pull or the suction force is the force which aids in drawing the water upward from roots to leaves. See more. NCERT Easy Reading. Stomate, any of the microscopic openings or pores in the epidermis of leaves and young stems. In which beaker would you expect the greatest decrease in weight? Exam. Besides, discover the factors affecting transpiration with elaborate explanations by a Biology expert in our video lessons. 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. 7. 3. Study the same and ansvver the questions that follow : (i) Name the apparatus. 0 votes. 6. Transpiration produces a tension or ‘pull’ on the water in the xylem vessels by the leaves. The movement of water out of the leaf stomata creates, when the leaves are considered collectively, a transpiration pull. Will you expect any difference in weight ? (iv) Transpiration is the loss of water in the form of water vapour from the aerial parts of the living plants. Transpiration 2. class 12 class 11 class 10 class 9 class 8 class 7 class 6. Main function of lenticel. Question 5 Name the various cells through which water moves upwards to reach the leaves? (iii) The stoma is open in A and is almost closed in B. So more water is lost than absorbed. (ii) Mention one limitation of this apparatus. It is used for the process of osmosis as semi- permeable membrane. Question 1: Draw a labeled diagram of the stomatal apparatus and label the following in it: Stoma, Guard cells, Chloroplast, Epidermal cells and Cell wall. 3. Question 1: Define transpiration. Give reasons to justify your observation in A & B. 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. Transpiration. Question 9: What is the advantage of wilting to a plant ? (iii) It helps in distribution of water to all parts of the plants. 11. (ii) Define the above mentioned process. Transpiration pull is the force which aids in drawing the water upward from roots to leaves. Stomata pass out water in the form of vapours. Question 7 How […] Transpiration ICSE Class-10 Concise Selina Solutions Chapter-5. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. (iv) Mention two structural features of A, which help in the function mentioned in (iii) above. Define transpiration. (iii) When the weight of the test tube (A & B) is taken before and after thee experiment, what is observed ? (i) What is the purpose of keeping CaCl2 vials inside the cup? (iii) What is the most apparent difference between A and B in the structure shown ? 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. This is called the transpiration stream. The process of release of water in the form of water vapor is called transpiration. Through these lenticels, gaseous exchange occurs between the soil and inner living cells. Guttation 6. Guttation is the elimination of excess of water from plants through : (a) Stomata (b) Hydathodes (c) Lenticels (d) Wounds. In this experiment which plant can be considered as the uncontrolled one? 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. (True) 8. 1 answer. The DPD increases in mesophyll cells due to loss of water causing cells to absorb water from neighbouring cellsby the process of endosmosis. Guttation is a similar process to transpiration in which some plants exudate the drops of xylem sap on the edges of the leaves. However, transpiration is tightly controlled. State its two functions. This loss of water in the leaves exerts a pull on the water in the xylem ducts and draws more water into the leaf. Hence, the guard cells become turgid and bulge outward due to their thin outer wall, thus widening the stomatal opening lying in between (Fig. Answer: (i) Transpiration: Loss of water as water vapour from aerial parts of the plant. Selina solutions for Concise Biology Class 10 Icse chapter 5 (Transpiration) include all questions with solution and detail explanation. (vii) Five. (v) What is the role of the air bubble in the experiment? Answer: (i) Garreau’s Potorneter. 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