Life processes and maintenance
Life processes are the basic activities such as nutrition, respiration, transport, and excretion that keep an organism alive.
Practice This ConceptMain explanation
Teacher 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.
Example
A human body takes in food and oxygen, carries nutrients in blood, and removes carbon dioxide and urea to stay active.
Simple analogy
Life is maintained by four needs: food, air, transport, and waste removal.
Common confusion
Students often treat life processes as separate facts instead of one linked system that supports survival.
Exam tip
In answers, connect at least two life processes and show how they support one another.
Answer writing and exam use
1-mark use
Write the exact meaning of life processes and maintenance in one clean line.
2-mark use
Define life processes and maintenance and add one example or condition.
3-mark use
Explain life processes and maintenance, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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