In which beaker the change of weight would be minimum? (iv) Why is the surface of water covered with oil. In Nerium, the stomata are present in Sunken pits. Answer: Plants absorb more water than required because minerals are present in extremely small quantity in absorbed water. Answer: Transpiration rate in such plants is very high during mid day and exceeds the water absorption rate of the roots. Transpiration mostly occurs in leaves through special structures present on them called as stomat Answer: Question 5: Transpiration and Translocation. ii. Practice: Transportation in plants. (Phagocytosis) 2. (True) 2. (v) What is the role of the air bubble in the experiment? In common land plants cuticular transpiration is only 3-10% of the total transpiration. (iv) It helps in ascent of sap in the plant. Root hairs are the extensions of the outer epidermal cells of the root. In human beings, the various organs associated with this system include the heart, lungs, blood vessels, capillaries, and blood.. It is considered as the essential evaporation of water through the leaves. 7. Low humidity in the atmosphere results decrease in the rate of transpiration. When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink ? (iii) Weight of test tube A will decrease after the experiment because water will be lost from it through the leaves by transpiration,. Chloroplast, 2. The heart is the pumping organ that squirts out blood. 9. (v) Define the term ‘transpiration’. It may take place from any part of the plant body. Transpiration DishaEducentre Exhaustive Notes TRANSPIRATION Scope of Syllabus: Mechanism of stomatal transpiration must be explained so that the concept of the process is clear. 6. 7. 10. (vi) The above structure helps in the process of transpiration. Lenticel 8. (ii) Mention one limitation of this apparatus. 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. Question 2: Name the three types of transpiration. TopperLearning’s chapter resources for ICSE Class 10 Biology – Transpiration will help you grasp the concept of how plants lose water vapour. Transpiration 2. 3. 4. The pH of the guard cells increases during day time. (iv) The oil has been put in each test-tube to prevent the loss of water by evaporation. 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. (i) A, V. (v) D and E. Question 11: Given below is an apparatus used to study a particular process in plants. DishaEducentre Biology for X ICSE Exhaustive Notes ~ 1 ~~ 1 ~ 4. It takes place through the sweat pores of the sweat glands. (v) Where is this structure likely to be found in a leaf? Because of their kidney shaped outline, they remain joined at their ends. Answer: Stomata are generally found on the epidermis of the leaf. Cuticular Transpiration: It occurs through the cuticle or epidermal cells of the leaves (Fig. (iii) Transpiration. In strong light, the rate of transpiration is more because stomata are wide open. Question 13: What are the disadvantages of transpiration ? Question 3: What is meant by the term transpiration stream ? Will you expect any difference in weight ? NCERT CBSE Chapter 6 Download in Pdf Life processes – The processes that are necessary for an organism to stay alive. Eg. (iv) The cobalt chloride paper placed on the lower surface of the leaf will show more pink dots as there are more stomata. Discussion of water transport through the xylem. (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. Answer : Odd term : Phagocytosis. Exchange of gases and transpiration 9. Guttation is a similar process to transpiration in which some plants exudate the drops of xylem sap on the edges of the leaves. 1800-102-5301 Question 14: “A higher rate of transpiration is recorded on a windy day rather than on a calm day.” Explain. Water and dissolved mineral … (iii) Which phenomenon is studied with the help of this apparatus? Present on the edges and tips of leaves of many plants. Thus, it proves that the rate of transpiration is greater from the under surface of dorsiventral leaves. 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. Water and dissolved sugars. If false rewrite the wrong statement in its correct form: 1. (False, More transpiration occurs from the under surface of a leaf.) 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. (iv) Gives rigidity and protection to the cell. ICSE Class 10 Biology Transpiration Understand transpiration in plants with TopperLearning’s ICSE Class 10 Biology – Transpiration – Transpiration study resources. It may also be due to blocking of the xylem elements, pathogens or parasites. Download Formulae Handbook For ICSE Class 9 and 10. Thus, the leaves loss its turgid state and show wilting. Give a reason to support your answer. Question 16: Describe an experiment to prove that transpiration occurs more from the under surface of dorsiventral leaves. Question 15: Explain the relationship between transpiration through the aerial parts and absorption by the root hairs. (iii) It helps in distribution of water to all parts of the plants. Answer: (i) 1. 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. You can watch our video lessons to understand different types of transpiration such as lenticular transpiration, cuticular transpiration and stomatal transpiration. More than 10% of the earth’s moisture is from transpiration. This force helps in the upward movement of water into the xylem vessels. Answer: (i) It results in ascent of sap by creating a suction force. the insertion of a single air bubble into the apparatus is very difficult. The apparatus used to compare the rate of transpiration in cut shoot. Five plants A, B, C, D and E were placed in a beaker containing water. Method:- Prepare a list of students having free or attached ear lobes and calculate the percentage of students having each. 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. It causes around 20% of transpiration in plants. (v) Suggest a suitable control for this experiment. Guttation takes place generally at Night. 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. The stomatal transpiration continues till the stomata are kept open. Transpiration, Photosynthesis, Phagocytosis, Guttation. A chemical used to prevent excessive transpiration in plants. 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) It lowers the rate of transpiration thus conserving water. Intro to vascular tissues (xylem & phloem) Xylem & transpiration . (ii) Due to high rate of transpiration plant suffer from loss of turgidity. Intro to vascular tissues (xylem & phloem) Xylem & transpiration . Cuticular transpiration 3. (iii) A foreign […] We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. 2. leaves may become narrow. (ii) They lose water vapour and process is termed stomatal transpiration. 8. Upper epidermis, 3. Guttation 6. It is the loss of water in the form of water vapour from the aerial organs of the plant. All the other three terms are concerned with processes in plants. 4. More transpiration occurs from the upper surface of a leaf. (ii) A plant with sunken stomata. 5. (iv) How many leaf veins have been shown in this section ? Mark questions answer: the loss of water vapour from the leaves and stems of plants, rate... Containing urea, uric add and salts are removed with water hydathodes send out water in each to. 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