Life Processes

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During exercise, muscles need more energy and produce more ATP. This requires increased oxygen intake and faster removal of carbon dioxide. The breathing rate increases to meet these higher oxygen dem

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Photosynthesis is the process by which plants convert carbon dioxide and water into glucose using sunlight and chlorophyll. Chemical equation: 6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O. It's essential becau

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1. Mouth: Salivary amylase breaks starch into simple sugars 2. Stomach: Pepsin begins protein digestion in acidic environment 3. Small intestine: Pancreatic enzymes complete breakdown - carbohydrates

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Fish have gills adapted to extract dissolved oxygen from water. Their gill filaments have large surface area and thin walls for efficient gas exchange. In air, gills collapse and stick together, preve

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The rate of photosynthesis decreases significantly. The covered leaves cannot receive sunlight, so they cannot perform photosynthesis. Only the uncovered leaves can photosynthesize, reducing the overa

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The heart has four chambers: two atria (upper) and two ventricles (lower). The right side handles deoxygenated blood (to lungs), left side handles oxygenated blood (to body). Valves prevent backflow,

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In tall trees, the distance between roots (water/mineral absorption) and leaves (food production) is very large. Simple diffusion is too slow for long distances. Xylem and phloem provide efficient tra

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Aerobic respiration uses oxygen, occurs in mitochondria, produces 38 ATP molecules, and creates CO₂ + H₂O as waste. Anaerobic respiration occurs without oxygen, in cytoplasm, produces only 2 ATP molec