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
From the viewpoint of life processes, why are digestion, respiration, transport, and excretion studied together even though they are different?If a leaf receives enough light but stomata remain closed for a long time why can the rate of photosynthesis decrease?How does opening and closing of stomata balance two opposite needs in a plant?In photosynthesis the green pigment is not just a colouring substance. What is its main function?If food is being made in leaves which tissue is most important for sending the energy source to roots?Upward movement of water in xylem is not considered dependent only on push from roots. How do leaves help in it?In autotrophic nutrition carbon dioxide and water are used for which major result?Formation of pseudopodia in Amoeba is most closely related to which step of nutrition?In the human digestive system food moves forward step by step due to which movement?Starch digestion starts in the mouth but why does this effect reduce in the stomach?Presence of acid and mucus together in the stomach shows which balance?Bile is considered helpful in fat digestion although it is not directly an enzyme. What is the reason?What is the strongest reason for considering the small intestine the main site of digestion and absorption?Villi and alveoli are in different organs yet they are based on which similar principle?Why is it correct to link the large intestine with water balance rather than the main site of digestion?Why is it necessary to understand breathing and cellular respiration separately?Why does aerobic respiration release more energy than anaerobic respiration?Why does lactic acid formation occur in muscles during heavy exercise?What is the combined advantage of many alveoli and their thin walls?Why can lack of haemoglobin cause tiredness and breathlessness?