Life processes and maintenance
Life processes are the basic activities such as nutrition, respiration, transport, and excretion that keep an organism alive.
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Student-friendly explanation
Living things do not stay alive only because they are made of cells. They need a constant supply of energy and materials, and they must also remove waste. These activities work together to maintain internal balance and support growth, repair, movement, and response.
How to write this in exams
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Start with the exact idea
Life processes are the basic activities such as nutrition, respiration, transport, and excretion that keep an organism alive.
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Then show how to use it
1. Name the process. 2. State its function. 3. Link it to energy or maintenance. 4. Add one example. 5. Conclude with survival or balance.
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Add one concrete example
A human body takes in food and oxygen, carries nutrients in blood, and removes carbon dioxide and urea to stay active.
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Avoid this incomplete answer
Life processes are only visible actions like movement. This is wrong because invisible processes inside cells are equally important.
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Why are nutrition, respiration, transport, and excretion called life processes?
They are called life processes because they supply energy, move materials, remove wastes, and keep the organism functioning and alive.
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