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Class 10 · Science
→Why does urea increase in blood when kidneys fail?
Class 10 · Science
→If the body is short of water, what should happen to water reabsorption in nephrons?
Class 10 · Science
→Why is reabsorption of useful substances necessary after filtration in nephrons?
Class 10 · Science
→Why is energy required for translocation of food in phloem?
Class 10 · Science
→How is food transport in phloem different from water transport in xylem?
Class 10 · Science
→Why may a plant close stomata when transpiration is very high and water availability is low?
Class 10 · Science
→How is upward movement of water in xylem possible against gravity?
Class 10 · Science
→If blood platelets are low, which problem may increase after an injury?
Class 10 · Science
→Why are capillaries most suitable for exchange of materials in tissues?
Class 10 · Science
→What problem may occur if veins do not have valves?
Class 10 · Science
→Why do arteries have thick and elastic walls?
Class 10 · Science
→If blood from the right and left sides of the heart mixes more, what will be the main disadvantage?
Class 10 · Science
→How is double circulation in humans related to high energy demand?
Class 10 · Science
→Why do fish need to keep water flowing through the mouth over the gills?
Class 10 · Science
→Why is the respiratory surface kept inside the body in terrestrial organisms?
Class 10 · Science
→Why is it necessary for the human respiratory surface to be moist and thin?
Class 10 · Science
→If haemoglobin becomes very low in blood, what will be the effect on cellular respiration?
Class 10 · Science
→If alveolar walls become thick, what will happen to gas exchange?
Class 10 · Science
→In which process is the formation of carbon dioxide by yeast during fermentation clearly seen?
Class 10 · Science
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