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SubjectsScience
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.
TOPIC PRACTICE
Up to 12 questions from this page. Select your focus, then start.
Step 1: A parasite takes food from the host. Step 2: This can reduce nutrients available to the host. Step 3: Therefore, parasitic nutrition can often harm the host.
View question detailsStep 1: Undigested material reaches the large intestine. Step 2: The large intestine absorbs water from it. Step 3: This prevents unnecessary loss of water from the body.
View question detailsStep 1: Breathing brings oxygen into the lungs. Step 2: Blood carries this oxygen to cells. Step 3: Cells use this oxygen to break food and release energy.
View question detailsStep 1: Water has less oxygen than air. Step 2: Continuous water flow over gills brings fresh oxygen. Step 3: This makes gas exchange more effective.
View question detailsStep 1: Alveoli provide large surface area in lungs. Step 2: If surface area decreases, gas exchange decreases. Step 3: Less oxygen weakens cellular respiration and fatigue increases.
View question detailsStep 1: Photosynthesis produces glucose and releases oxygen. Step 2: Respiration uses glucose and oxygen. Step 3: Therefore, at the material level, both processes are connected.
View question detailsStep 1: In a multicellular body, all cells are not directly exposed to the environment. Step 2: Internal cells also need nutrients and oxygen. Step 3: A transport system carries these materials over distances.
View question detailsStep 1: Cellular activities produce wastes. Step 2: These wastes can be toxic in excess. Step 3: Excretion removes them and keeps cells safe.
View question detailsStep 1: Every cell needs energy to work. Step 2: Growth and repair also need materials. Step 3: Nutrition, respiration, transport, and excretion together maintain this balance.
View question detailsStep 1: Digestion converts food into simple substances. Step 2: Blood carries these substances to cells. Step 3: Without glucose reaching cells, cellular respiration will produce less energy.
View question detailsStep 1: Nutrition provides food and respiration releases energy. Step 2: Transport carries materials to the right places. Step 3: Excretion removes wastes, so all processes together maintain life.
View question detailsThe brain and spinal cord together form the central nervous system. The brain processes information and coordinates activities, while the spinal cord transmits messages between the brain and body and mediates many reflex actions. The other systems are different in function: the digestive system processes food, the respiratory system handles gas exchange, and the excretory system removes wastes — none are composed of brain and spinal cord. Exam tip: Memorize that the CNS = brain + spinal cord and list one primary function of each in answers.
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