Answer : Odd term : Phagocytosis. Ice cold water will hamper the process of photosynthesis in the immersed leaf, even if there is sufficient sunshine because the temperature is an important factor for the rate of photosynthesis. (a) Respiration and photosynthesis (gas released), (b) Light and dark reactions (products formed), (c) Producers and consumers (mode of nutrition), (d) Grass and grasshopper (mode of nutrition), (e) Chlorophyll and chloroplast (part of plant cell). (b) Invert a test-tube full of water over the stem of the funnel. Solution:-. (c) What is the purpose of keeping a snail in test-tube B? Thylakoids. Photosynthesis is responsible for the presence of oxygen in our atmosphere. Plants also store excess sugar by synthesis of starch Heterotrophs, including humans, may completely or partially consume plants for fuel and raw materials. The plant in test tube B has more concentration of CO2 available because the snail releases CO2 during respiration. (h) Photosynthesis occurs only in cells containing chloroplasts. All the other three terms are concerned with processes in plants. ... ICSE 10 Biology Revision Notes. (b) Why was the plant placed in the dark before beginning the experiment? Answer : Photolysis in photosynthesis is the splitting of water molecules into hydrogen ions and hydroxyl ions in the presence of chlorophyll and light. Why? To test the leaf for starch, the leaf is boiled in water to kill the cells. All life owes its existence to chlorophyll. These solutions can help students clear doubts quickly and help in learning the topic effectively. Respiration. The starting point of any food chain is always a plant. Given below are five terms. The splinter glows due the presence of oxygen in the test tube which proves that the gas collected in the test is released by hydrilla during photosynthesis. (d) Before starting the experiment, it is necessary to destarch the leaves of the plant by keeping          the  plant in complete darkness for 48 hours. (b) Boil the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. The blood vessels supplying blood to the kidney. Photosynthesis requires CO2 as the substrate in green plants. (a) Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items. Excretory System ICSE Class-10 Concise Selina Biology Solutions for ICSE Class 10 Chapter-9. Non-green plants such as fungi and bacteria obtain their nourishment from decaying organic matter in their environment. 13. If a green plant is kept in bright light, it tends to use up all the CO2 produced during respiration, for photosynthesis. 11. Yes, we have to take a step before starting the experiment. One of the leaves was covered with black paper in the centre. The gas released during photosynthesis is oxygen. Do solve all questions of ICSE Chemistry with the help of Entrancei ICSE Class 10 … (g) The part of chloroplast where the dark reaction of photosynthesis takes place. (f) Stomata: The main function of stoma is to let in carbon dioxide from the atmosphere for photosynthesis. (c) What is the purpose of keeping a snail in test-tube B? Animals are heterotrophic (different nutrition). (b) Will it work satisfactorily? (b) Explain the physiological process as mentioned above in (a). CBSE ... Factors affecting Photosynthesis and Experiments on Photosynthesis; Absorption by Roots - The processes involved. ICSE Class 10 Biology solutions for chapter-6 Photosynthesis. Both test-tubes are kept in sunlight. (3) Chemical equation for the process of photosynthesis: The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. (e) The starting point of carbon cycle is the release of carbon dioxide by animals during respiration. Also most of the oxygen produced during photosynthesis diffuses out into the atmosphere through the stomata. Name the following: a. How do non-green plants such as fungi and bacteria obtain their nourishment? Extramarks, an e-learning website offers online tutorials for ICSE class 10 Experiments on Transpiration Chapter. Dark reaction of photosynthesis occurs simultaneously with light reaction. (Select the most appropriate option in each case), 1. Chloroplasts are minute oval bodies bounded by a double membrane, and their interior contains closely packed flattened sacs (thylakoids) arranged in piles (grana) lying in a colourless ground substance called the stroma. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch. During this period, all the starch from the leaves will be sent to the storage organs and the leaves will not show the presence of starch. Correct Statement: Dark reaction of photosynthesis is independent of light and occurs simultaneously with light reaction. Solution:-, To study the effect of sunlight on the rate of photosynthesis. A candidate studied the importance of certain factors in photosynthesis. (d) A plant and a snail are kept in test tube B. This page consists of solutions of all questions asked in ICSE Biology Photosynthesis. (ii) Dark reaction. (c) Stroma is ground substance in  chloroplast. One would easily think that the rate of photosynthesis will increase with light intensity. The other uncovered leave of the potted plant act as a control. Describe the main chemical changes which occur during photosynthesis in: The light reaction occurs in two main steps: (1) Activation of chlorophyll – On exposure to light energy, chlorophyll becomes activated by absorbing photons. (b) Immediate product of photosynthesis is glucose. 2019-03-01. Invert a test tube full of water over the stem of the funnel. Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. (d) Destarching of the leaves of a potted plant can occur only at night. It is not possible to demonstrate respiration in green plants kept in sunlight because during day time plants are undergoing photosynthesis. Solution:-. 1 Mark Questions Answer : Lenticels help in facilitating the process of transpiration in woody plants. Short Questions. When sufficient gas gets collected, a glowing splinter will be introduced in the test tube, which will burst into flames. (d) Xylem Tissue in the Leaf Veins: Water is essential for photosynthesis to occur. The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. In the darkness, respiration alone is responsible for changes in the gaseous composition of the plant’s surrounding atmosphere. What aspect of photosynthesis was being investigated? Solution:-. (e) In the flowering plants, food is transported in the form of……………………… (sucrose, glucose, starch). Photosynthesis is an important activity of all green plants which are able to synthesis food from carbon dioxide and water in the presence of chlorophyll and light energy. 6. Phloem is the tissue that transports manufactured type of starch from leaves to all parts of the plants. (4) and the region, which dose not contain starch, turns ………………(5). Hence most leaves have the upper surface more green and shiny than the lower one. Grass is a producer. (a) Dip the leaf in boiling water for a minute to kill the cells. It is then placed in a dish and …………. To some extent, it is true. A single vascular bundle, no matter how large or small, always contains both xylem and phloem tissues. Date. Oxygen is used up and carbon dioxide is released. 5. (f) Write the overall chemical equation for the above process. The purpose of keeping a snail in test-tube ‘B’ is to increase the rate of photosynthesis by increasing the concentration of carbon dioxide. The glucose is converted into insoluble starch and later into soluble sugar i.e. We know that the oxygen is consumed during respiration in plants hence it cannot be demonstrated at the daytime, as plants carry out respiration at night. (ii) Structure of chromosome: Basic structure of chromosome with elementary understanding of terms such as chromatin, chromatid, gene structure of DNA and centromere. The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because, a) starch is immediate product of photosynthesis, b) glucose formed in photosynthesis soon gets converted into starch, 2. Oxygen is used up and carbon dioxide is released. MULTIPLE CHOICE TYPE Photosynthesis ICSE Class-10 Concise Selina Biology. The main function of the stomata is to let in CO2 from the atmosphere for photosynthesis. Explain. ... Download Formulae Handbook For ICSE Class 9 and 10. Photosynthesis is ultimately the source of energy and food for all living being directly for plants and indirectly for animals and humans who eat the plants or the plant-eating animals. Significance and major differences between mitotic and meiotic division. Oxygen is released as a by-product. The water is then distributed in the mesophyll tissue. Animals derive their food from plants either directly by eating their part, or indirectly by eating the plant-eater. The light energy is then converted into chemical energy in the form of glucose using carbon dioxide (CO2) from the atmosphere, and water (H2O) from the soil. (f) Photosynthesis results in loss of dry weight of the plants. (c) If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesise in bright sunshine. The presence of starch is indicated by a blue-black colour. Green plants (producers) use carbon dioxide of the air to produce carbohydrates and release oxygen to the atmosphere. (d) The first form of food substance produced during photosynthesis. If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will continue to occur because these set of reactions are independent of light and it occurs simultaneously with the light-dependent reaction. Given below is a schematic diagram to illustrate some aspects of photosynthesis. Therefore, the plant was kept in the dark before the experiment. Correct Statement: Respiration results in loss of dry weight of the plants. d. Describe step by step, how the candidate proceeded to test the leaf for the presence of starch? Solution:-. Correct Statement: Green plants are producers. 6. (d) The dark reaction of photosynthesis is known as…………… (Hill reaction, cyclic phosphorylation, Calvin cycle). Carbon dioxide is used up and oxygen is released. solution in added. (a) Define photosynthesis. The atmospheric temperature is an important external factor affecting photosynthesis. A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to, c) ensure that no photosynthesis occurred, d) ensure that the leaves are free from starch, 9. ICSE Class 10th Biology Photosynthesis MCQS. This increases the rate of photosynthesis in the plant placed in test tube B. Here, we present set 1 of Photosynthesis flashcard notes. c. Why was the plant kept in the dark before the experiment? A glowing splinter bursts into a flame which shows the presence of oxygen. It takes place in the presence of light. This matter comes from dead animals and plants. Question 1 (a) Name the following: [5] (i) The organization which procures and supplies blood during an emergency. (f) Stomata are minute opening occurring in large numbers on the lower surface of a leaf. Our specialist teachers have answered these exercises to help you with your exam preparation to achieve good marks in the subject. Some of the oxygen may be used in respiration in the leaf cells (the phenomenon is called photorespiration), but the major portion of it is not required and it diffuses out into the atmosphere through the stomata. Dip a leaf in boiling water for a minute to kill the cells. Photosynthesis. Question 15 : Complete the following statement by filling in the blanks with the appropriate word from the choices given in … (b) The outside atmospheric temperature has no effect on the rate of photosynthesis. Free PDF download of ICSE Class 10 Biology revision notes and short key-notes to score more marks in your exams, prepared by our expert Biology teachers as per CISCE guidelines. Both test-tubes are kept in sunlight. Oct 16 • Board Sample Papers • 6131 Views • 1 Comment on ICSE Sample Paper of Biology Class 10 Indian Certificate of Secondary Education ( ICSE ) is an examination conducted by the Council for the Indian School Certificate Examinations which is a private non-governmental board of school education in India for class X. (ii) Dark reaction: The reactions in this phase does not require light energy and occur simultaneously with the light reaction. The gas released during respiration is carbon dioxide. However, in a sense, even this oxygen is not a waste because all organisms require it for their existence including the plants. (CaCl2, iodine solution, Benedict solution), (c) Stroma is ground substance in ……………. Correct Statement: Starch produced in a leaf is stored temporarily in the leaf until the process of photosynthesis. (a) Place some water plants (Elodea or Hydrilla) in a beaker containing pond water and cover them by a short-stemmed funnel. Extra Questions for Class 10 Science Chapter 6 Value Based Questions. (c) Name the biological process which was the starting point of the whole chain. (Ensure that the level of water in the beaker is above the level of the stem of the inverted funnel). Some of this oxygen may be used in respiration in the leaf cells, but the major portion of it is not required and it diffuses out into the atmosphere through the stomata. State any four differences between photosynthesis and respiration. Given below is the diagram of an experimental set-up: (a) What is objective of this experiment? Give reason. (g) Photosynthesis stops at a temperature of about 35oC. No, the experiment will not work satisfactorily because, as mentioned in the above statement carbon dioxide is very important in the photosynthesis. Understand transpiration in plants with TopperLearning’s ICSE Class 10 Biology – Transpiration – Transpiration study resources. With the rise in temperature, the rate of photosynthesis rises. The male hormone produced by the interstitial cells. (e) The phloem transports the photosynthetic products from the leaf to the other parts of the plant. Oxygen is released during photosynthesis. To study the effect of sunlight on the rate of photosynthesis. This increases the rate of photosynthesis in the plant placed in test tube B which leads to the release of more amount of oxygen. Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. (d) The dark reaction of photosynthesis is known as  Calvin cycle, (e) In the flowering plants, food is transported in the form of  sucrose. The uncovered portion (exposed to sunlight) turned blue-black colour and the covered portion showed brown colour. ShikshaHouse. A. Question 1: Define transpiration. (e) Draw a neat diagram of a chloroplast and label its parts. they depend directly or indirectly on the producers for their food. Photosynthesis is the biological process which was the starting point of the whole chain. The appearance of a blue-black colour on the leaf is indicative of the presence of starch. Step 2:- Splitting of water. 10. All green plants and a few other autotrophic organisms utilize photosynthesis to synthesize nutrients by using carbon dioxide, water and sunlight. The potted plant was kept in the dark for 24 hours. 2. The site of light reaction in the cells of a leaf is grana. These notes are totally based on latest Biology textbook of ICSE Board. Oxygen is the element which all the organisms 2-4 and even 5 are getting from No. 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. (b) Name any one organism that could be shown at No.5. (b) Cuticle: Cuticle is transparent and water proof due to which light can penetrate this later easily. With four organisms 1 – 4. Carbon dioxide is absorbed by producers to make glucose in photosynthesis. (a) Guard cells Solution:-. The rate of photosynthesis is not affected by, a) breaking down water into hydrogen and oxygen. Chlorophyll is the foundation site for the photosynthesis in green plants. (3) solution in added. It is then placed in a dish and iodine solution in added. Bubbles appear in the stem which rise and are collected in the test tube. 12. Chloroplasts are the kind of plastids found in the mesophyll cells of the leaf. A candidate studied the importance of certain factors in photosynthesis. Photosynthesis | Importance of Photosynthesis | ICSE Class 10 Biology Chapter 6 | Selina Concise Solution | Umang 2020 | #Vedantu9thand10thEnglish with Processes of photosynthesis-; 1)Light reaction: It takes place only in presence of light and occurs in grana region of plastids. Covered and uncovered part of chloroplast where the dark for 24 to 48 hours to destarch it, i.e respire! 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