Key term for Edexcel GCSE Biology, used in Cells and Microscopy.
One-thousandth of a metre (10⁻³ m), acting as the baseline for the biological factor-of-1,000 metric scale.
Millimetre (mm) appears in Edexcel GCSE Biology revision content for Key Concepts in Biology, especially Cells and Microscopy and Number, Size and Scale.
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