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All biological images and diagrams are reproduced or drawn at a size that we can easily visualise on the page. However, these images can be of large organisms, microscopic structures such as cells, or even small molecules.
The international standard for measurement (SI, short for Système International), commonly known as the metric system, uses metre (m) as the unit of length. The metric system uses prefixes to indicate different orders of magnitude of its measurements. For example:
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