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
If a leaf is first kept in darkness and then placed in light without carbon dioxide, what is expected in the starch test?The role of water in photosynthesis is not limited to water supply. What is one major result of its use?If saliva secretion in the mouth decreases, what combined effect will occur on digestion and swallowing?Why are both acid and mucus necessary in the stomach?If acid is not produced in the stomach, what will happen to protein digestion?Bile juice has no enzymes yet why is it important for fat digestion?If the liver does not make bile juice which nutrient digestion will be most affected in the small intestine?The presence of villi and blood capillaries in the small intestine makes which combined function effective?Why is wave-like muscular movement important for maintaining food direction in the human digestive system?If the large intestine does not absorb enough water which result is most suitable?During hard running if muscles lack oxygen how can they still get energy?If the walls of alveoli become thick what will happen to gas exchange?What is the main advantage of blood capillaries around alveoli?Why can a person get tired quickly when haemoglobin is low?How is a four-chambered human heart useful for a body with high energy needs?What is the main reason for the difference between artery and vein walls?If veins had no valves, what problem would be most likely?Thin walls of blood capillaries are most suitable for which function?Why can even a small injury become serious when platelet count is very low?If xylem gets blocked, why can photosynthesis decrease in leaves?