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Question
How can a single-celled organism carry out all its life processes when billions of cells are required to perform similar functions in multicellular organisms like us?
Short Answer
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Solution
A single-celled organism carries out all life processes within one cell using its organelles. Nutrition, respiration, excretion, and reproduction all occur inside this single cell. In multicellular organisms, cells become specialised and divide these functions among tissues and organs.
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