Functions of stomata: Stomata help in the exchange of gases. 7. These pores are called stomata. The collected blood is then pumped to the lungs for the purification. Therefore, waste products are necessary to be excreted out. Blood cells are of three types — RBCs (Red blood cells), WBCs (White blood cells) and blood platelets. How desert plants utilize CO2 during photosynthesis? This pigment helps in carrying oxygen to various parts of the body by blood, Q.11.Describe the function of the heart. Haemoglobin helps in transportation of oxygen. Evaporation of water from the leaf surface occurs through stomata. If accumulated, they can damage our body parts, and hence prove fatal. Q.5.What will happen if there are no platelets in the blood? ... stomata (d) root hair (d) root hair ... (b) 2 to 5 L (c) 2 to 2.5 L (d) 1 to 1.8 L (d) 1 to 1.8 L. 5. (i) in the shade (ii) in dim light (iv) Platelets help in clotting of the blood, Q.9.Why is blood needed by all the parts of a body? Welcome To Champstreet. NCERT Solutions for Class 7 Science PDF free download, NCERT Solutions for Class 7 Science Chapter 11 Transportation in Animals and Plants, to Study online or download free in PDF form. If there are no platelets, then blood would not clot in case of an injury. Revisewise Education Solutions Pvt. 9. NCERT Books chapter-wise Solutions (Text & Videos) are accurate, easy-to-understand and most helpful in Homework & Exam Preparations. Vascular Tissues. (iii) White blood cells are the fighting cells which protect us against bacteria and foreign materials causing infections. 2. A red pigment called haemoglobin gives the blood its red colour. Explain. 10. Transport in Plants Tissue. (i) xylem. Answer: The small pores present on the under-surface plant leaves whose opening are surrounded with guard cells is known as stomata. MCQ Questions for Class 7 Science: Ch 11 Transportation in Animals and Plants. Answer: Transpiration serves a … They can either be present on either the sides or just on one side of the leaf. Functions of stomata: (a) Stomata help in the exchange of gases. (viii) Water reaches great heights in the trees because of suction pull caused by ______ . The labelled diagram of the human excretory system is as follows : For today's students, learning can happen anytime, anywhere. (ii) It helps in getting rid of the excess water. (iii) under the fan (iv) covered with a polythene bag. Q.6.What are stomata? NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. (vi) Sweat contains water and . ; The loss of excess water in the form of water vapour. Give two functions of stomata. The main function of stomata are : They are necessary for exchanging gases like Co2 or O2 with the atmosphere. (v) urea (vi) salts (vii) urine (viii) transpiration, Choose the correct option: (ii) Haemoglobin is present in ___________ cells. Stomata are found on the leaves of plants. Evaporation of water from the leaf surface occurs through stomata. 4. What are stomata? (v) Blood helps to fight against disease causing germs and infections. Timings: 10.00 am to 7.00 pm Monday to Friday (Saturday till 2:30 pm), Explore all our videos and questions with 1 Month Free trial. Q.4.Why is transport of materials necessary in a plant or an animal? It is needed by all parts of our body because it performs following important functions : a. Stomata help in the exchange of gases. Certain waste and toxic products are formed during functioning of body cells. Functions of stomata The functions of stomata are: (i) During photosynthesis and respiration, stomata help in exchange of gases (carbon dioxide and oxygen). Transpiration rates increase, when stomata are open, and it decreases when it is closed. But it clots on its own. Ans.There are four components of blood: In many plants, stomata remain open during the day and closed at night. Explain. The main components of blood are — plasma and blood cells (or blood corpuscles). Write the balanced equation of photosynthesis. Does transpiration serve any useful function in the plants? These openings are surrounded with guard cells. (i) Every cell needs a regular supply of nutrients and oxygen to release energy through respiration. Q.13.Draw a diagram of the human excretory system and label the various parts. It pumps it to the left ventricle, which in turn pumps off the purified blood to all parts of body through arteries. Answer: Transpiration is the evaporation of water from the plants. (b) Water absorption through roots can be increased by keeping the plants As such, guard cells play a crucial role in photosynthesis by regulating the entry of materials necessary for the process. 2. Ans. And when the guard cells lose water, which causes the cells to become flaccid, which results in the stomatal opening to close. 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