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
Based on the whole chapter what is the deepest meaning of life processes for survival?ExpertLevel 23If a leaf receives light but carbon dioxide is removed from its surroundings, what will be the result of the starch test?ExpertLevel 24Why is starch found only in the green part of a variegated leaf?ExpertLevel 24What happens to stomata if water moves out of guard cells?ExpertLevel 24Plants close stomata in strong sunlight when water is scarce. What disadvantage can this also cause?ExpertLevel 24Splitting of water in photosynthesis is directly linked with which result?ExpertLevel 24If starch has formed in a leaf, what does it prove?ExpertLevel 24In Amoeba, ingestion of food depends on what?ExpertLevel 24If saliva lacks amylase, which digestive process in the mouth will be affected first?ExpertLevel 24Why is the oesophagus important in digestion even though it has very little digestive juice?ExpertLevel 24What is the dual importance of hydrochloric acid in the stomach?ExpertLevel 24How does bile increase enzyme action in fat digestion?ExpertLevel 24What is the main benefit of both digestion and absorption occurring in the small intestine?ExpertLevel 24Why is it necessary for villi to have blood capillaries?ExpertLevel 24Why is aerobic respiration considered more efficient than anaerobic respiration?ExpertLevel 24What is the basic reason for lactic acid formation in muscles during heavy exercise?ExpertLevel 24What directly causes dough to rise during fermentation by yeast?ExpertLevel 24Which combination is most suitable for rapid gas exchange in alveoli?ExpertLevel 24If fluid accumulates in alveoli, what will happen to respiration?ExpertLevel 24Why does haemoglobin easily combine with oxygen in the lungs?ExpertLevel 24