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Particulate matter is solid particles and liquid particles suspended in air. Polluted air contains more particulate matter than clean air. A high concentration of particulate matter results in the death of some alveolar epithelium cells.
Paper 4 Theory (Extended) 0610/41. May/June 2020. You must answer on the question paper. No additional materials are needed. 1 hour 15 minutes. INSTRUCTIONS. Answer all questions. Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
An example of a buffer system is the bicarbonate system in the human body. This system is able to absorb hydrogen and hydroxide ions to prevent changes in pH and keep cells functioning properly. 18 Carbon is unique and found in all living things because it can form up to four covalent bonds between atoms or molecules.
Oct 31, 2023 · The concepts of biological regulation and maintenance of homeostasis are key to survival and define major properties of life. Organisms use energy to maintain their metabolic processes. Populations of organisms evolve to produce individuals that are adapted to their specific environment.
Oct 13, 2021 · Matter and energy are key players in the process of life at all levels : cell, organism, and ecosystem. Both matter and energy are familiar ideas, yet misconceptions are common, especially about energy and the interplay between matter and energy in biological systems.
Sep 21, 2021 · All groups of living organisms share several key characteristics or functions: order, sensitivity or response to stimuli, reproduction, adaptation, growth and development, regulation, homeostasis, and energy processing. When viewed together, these eight characteristics serve to define life.
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Practice Edexcel sample exam questions for the GCSE Biology key concepts in biology topic.
