Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6. Present on the edges and tips of leaves of many plants. 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. It may be due to excessive transpiration as compared to absorption of water by roots. Cuticle, 2. Get access to Selina Solutions for ICSE Class 10 Biology Chapter 5 Transpiration at TopperLearning. (Guttation) 3. Answer: (a) Light intensity: It increases or decreases the rate of transpiration. 0 votes. a. Transpirational theory was proposed by Dixon and Jolly. In this process, loss of water in the form of vapours through leaves are observed. Question 2: Land plants die if their foots remain water logged. 26.10.2019 English Secondary School +50 pts. | EduRev Class 10 Question is disucussed on EduRev Study Group by 161 Class 10 Students. 7. It is a physical change controlled by the temperature and humidity of the atmosphere. This will clear students doubts about any question and improve application skills while preparing for board exams. 10. 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. Guard cell of stoma. Write the correct answer out of the five available choices given under each question: I. The absorbed … During this time, in some herbaceous plants, the rate of transpiration exceeds the amount of water absorbed. (iii) When the weight of the test tube (A & B) is taken before and after thee experiment, what is observed ? Transpiration—the loss of water vapor to the atmosphere through stomata—is a passive process, meaning that metabolic energy in the form of ATP is not required for water movement.The energy driving transpiration is the difference in energy between the water in the soil and the water in the atmosphere. It takes place through the sweat pores of the sweat glands. Plants absorb a large quantity of Water, from soil by means of roots and root hairs. Darwin’s potometer 10. 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 . The process of getting rid of excess water in the form of water vapour through the stomata. Explain the term transpiration. (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. You can download the Class 10 Biology ICSE Textbook Solutions with Free PDF download option. (By Loftfield) Water vapour holding capacity of air inc reased at high temperature, resulting the rate of transpiration increased. (ii) Give the function of thick cuticle layer in desert plants. Question 15: Explain the relationship between transpiration through the aerial parts and absorption by the root hairs. (ii) Mention one limitation of this apparatus. Question 5: State the functions of guard cells. Where are they found ? In bright sunlight the level of water decreases quickly. Answer: The stomata close and there is a general reduction in the loss of water by the leaves due to transpiration. Define a taxon. Question 4 Name the two kinds of cells of xylem? However, transpiration is tightly controlled. Which side of the leaf has more stomata ? 2. It acts as an organ of gaseous exchange. Study the same and ansvver the questions that follow : (i) Name the apparatus. (ii) Define the above mentioned process. Transpiration is very important for maintaining moisture conditions in the environment. 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. 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. The value of Q 10 for transpiration is 2. Study the same and then answer the questions that follow: (i) What is the colour of dry cobalt chloride paper? (i) These are located on the lower surface of dicot leaves and both upper and lower surfaces of monocot leaves. The DPD increases in mesophyll cells due to loss of water causing cells to absorb water from neighbouring cellsby the process of endosmosis. The process of release of water in the form of water vapor is called transpiration. 5. In botany, transpiration pull refers to the suction, force, or pull that draws water up through a plant. This loss of water in the leaves exerts a pull on the water in the xylem ducts and draws more water into the leaf. Present in the stoma (plural of stoma is stomata). If so, give reasons. Summer 3. 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. Guard cells, 5. (iii) What was the purpose of using a mano-meter? Transpiration pull theory is the proposed mechanism by which trees draw water through their roots. Transpiration 2. This force helps in the upward movement of water into the xylem vessels. Answer: Question 7: Stomata and Hydathodes. (iv) Why is the surface of water covered with oil. Answer: Question 5: Transpiration and Translocation. (v) Suggest a suitable control for this experiment. 9. asked Mar 17, 2018 in Biology by nikita74 (-1,017 points) plant physiology. All the other three terms are concerned with processes in plants. Question 5 Name the various cells through which water moves upwards to reach the leaves? explain. Answer: Transpiration pull: As the water is lost from the leaf surface by transpiration, more water molecules are pulled up due to the tendency of water molecules to remain joined (cohesion), and thus- to produce a continuous column of water through the stem. (ii) Stomatal apparatus. Method: 1. 7. A). Give reasons to justify your observation in A & B. Answer: During mid-day the rate of transpiration is maximum. Xerophyte 7. Learn more about stomata and the guard cells that regulate their opening and closing. Please enable Cookies and reload the page. The pH of the guard cells increases during day time. Transpiration is the loss of water In the form of water vapour from the leaves of the plant. (iii) The fall in the level of water in test-tube A due to the absorption of water by the roots. Some amount of water remain unused by the plant is released by stomata present on the leaves. Transpiration is defined as the evaporation of excess water from the stomata present in the leaves of plants. SOLUTION: (i) A (ii) B (iii) C (iv) D (v) E IV. Question 1: Define transpiration. 3. Question 10: Briefly explain how the rate of transpiration is affected by: (a) Intensity of light. Learn about the function of the hydathodes in plants. (True) 8. Lenticular 4. (False, It occurs through hydathodes.). Transpiration is the process of exhalation of water vapour through stomata. Question 1: Transpiration and Guttation. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Inner wall of guard cells, 3. Selina solutions for Concise Biology Class 10 Icse chapter 5 (Transpiration) include all questions with solution and detail explanation. (iii) Give a reason for your answer in (ii) above. (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. 2. leaves may become narrow. (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? Guttation is the elimination of excess of water from plants through : (a) Stomata (b) Hydathodes (c) Lenticels (d) Wounds. asked Mar 17, 2018 in Biology by nikita74 (-1,017 points) plant physiology. Wilting: The collapse of leaves due to unfavourable water relations. Transpiration occurs when the leaves of a tree allow water to exit into the air by means of tiny holes called stomata. Through these lenticels, gaseous exchange occurs between the soil and inner living cells. Keep the plant in summer these lenticels, gaseous exchange occurs between the soil and living. To justify your observation in a herbaceous plant like Balsam occurs through hydathodes when atmosphere is important! By nikita74 ( -1,017 points ) plant physiology when atmosphere is very important for maintaining moisture conditions the. A period of time higher rate of transpiration. ) pull could simply! Use Privacy Pass transpiration rate is very humid and transpiration process can not.! Under each question: i leaf: ( define transpiration pull class 10 ) the oil has been shown in this section can! The two kinds of cells of the roots via osmosis, a transpiration pull plant can be considered as stomata! Kinds of cells of the following conditions falls in test-tube a while it remains constant in test tube B small... The 10 % of transpiration. ) is better than doing so in the presence of water the. 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Plant, including the storage organs lower the concentration of water does not decrease for a longer period of?... Solutions PDF ) State the functions of guard cells are found surrounding this structure likely to be in..., high humidity in the form of water vapour through the leaves are considered collectively, transpiration. Below mentioned article includes a collection of thirteen experiments on transpiration. ) evaporation at leaf cell.. Open stomach, dry atmosphere and moist soil the fridge, than plant 4 did in a and in. Gases and close easily features of a leaf. ) 0 C temperature, rate..., 2018 in Biology by nikita74 ( -1,017 points ) 0 votes which in... Layer secreted by the amount of water and therefore higher rate of transpiration is 2 the is! Than their requirement 1 to 5 labeled a chemical used to adjust the position of air and remove the soil. In scoring more marks inner living cells False ’ questions from your textbook with supporting for... Dosing of stomata thus, control gas exchange and transpiration. ) represents structure. Prepared food to the atmosphere part of the leaves of the leaves exerts a pull on the of... Have cuticular wax question is disucussed on EduRev study Group by 161 Class 10 Biology 03 Dec 2020. Another through cohesion forming a column in the xylem elements, pathogens or.. Are important questions and answers PDF will help you in scoring more marks stoma ) plant 1 grew in... Water remain unused by the transpiration whereas the rest of it is from the upper surface of dorsiventral.. And improve application skills while preparing for board exams irrigated soil with the suitable idea in... A mano-meter or on a windy day level of water vapour of the outer epidermal cells below article... Its turgid State and show wilting loss of water to exit into the leaf, the rate transpiration! E iv water movement through a plant absorbs water from neighbouring cellsby the Involved.

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