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Subjects

Science

Life Processes

जीवन प्रक्रियाएँ

In this Class 10 Science topic from the chapter “World of Living,” students explore the essential processes that keep organisms alive and functioning. They learn how plants and animals obtain and use nutrition, release energy through respiration, transport substances such as water, minerals, gases and food, and remove metabolic wastes through excretion. The topic connects these ideas with photosynthesis and the roles of major human body systems, helping students understand how living organisms maintain life through coordinated biological activities.

Practice questions

How is upward movement of water in xylem possible against gravity?Why may a plant close stomata when transpiration is very high and water availability is low?How is food transport in phloem different from water transport in xylem?Why is energy required for translocation of food in phloem?Why is reabsorption of useful substances necessary after filtration in nephrons?If the body is short of water, what should happen to water reabsorption in nephrons?Why does urea increase in blood when kidneys fail?What is the main function of a semipermeable membrane in dialysis?Why does the human body convert ammonia into urea?How do plants manage wastes even without separate excretory organs like animals?Which explanation correctly describes energy conversion in autotrophic nutrition?Why do heterotrophic organisms need to digest food?Why do fungi digest food outside the body and then absorb it?If the large intestine does not absorb water properly, what effect can occur in the body?In what form is most carbon dioxide carried in blood, and why is it useful?How can photosynthesis and respiration be connected in terms of exchange of substances?If phloem is damaged in a plant, what effect may occur on roots?Why may leaves wilt if xylem is blocked in a plant?Which relation between excretion and respiration is correct?In which situation can the human body temporarily shift from aerobic to anaerobic respiration?