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Exponential growth of cells is a characteristic feature of

1. tissue culture cells
2. multicellular organisms
3. unicellular organisms
4. embryo

Correct answer: tissue culture cells

Solution

Tissue culture cells are maintained in nutrient-rich media with favorable conditions, so they can divide rapidly and show exponential growth. In contrast, growth in multicellular organisms is usually regulated, and unicellular organisms do not typically exhibit this lab-style growth pattern in the same context.

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