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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

Why is carrying carbon dioxide only by binding to haemoglobin not considered enough?Having four chambers in the human heart is most related to which need?Why does blood pass through the heart twice in one complete cycle of double circulation?Which structural difference is suitable because arteries have high pressure and veins have low pressure?Why is a network of capillaries spread near tissues?If platelets are very low, why can injury become more dangerous for survival?What mainly causes transpiration pull in the upward movement of water through xylem?If soil near plant roots becomes very salty, why can water absorption decrease?Why is translocation of food in phloem energy dependent?Which is the most correct comparison between xylem and phloem transport based on direction?If the bark layer containing phloem is removed in a ring, what will happen to the roots?Why are both filtration and reabsorption necessary in nephrons?Why can urine become more concentrated on a hot day when less water is drunk?Why is conversion of ammonia into urea in the liver necessary for excretion?Why do blood cells not pass out through the membrane during dialysis?If kidneys do not remove urea, which problem will increase first in the body?Why do plants store some wastes in old leaves?What is the deepest relation between nutrition and respiration?What is the basic difference between digestion and absorption?Why is external digestion necessary in saprophytic nutrition?