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Units of measurement in biology

The shapes of cells

The shapes of bacterial cells

Size in the natural sciences

The sizes of different cells and their parts

The sizes of different organisms and their parts

Choosing the right optical instrument

The discovery of the light microscope

Structure of the light microscope

Microscope structure

Parts of the light microscope

Light microscopy – magnifying the object

Light microscopy – magnifying the object

Light microscopy – enhancing the image

Sample preparation

Light microscopy – preparing a slide

The electron microscope

A brief history of the electron microscope

The electron microscope – structure and operation

The electron microscope