P3.2—Microscopy skills and biological drawings

Microscopy requires correct focusing, scale calibration and drawings that show observable structure in proportion without shading.

Use a stage micrometer or eyepiece graticule to calculate actual size, then draw only what the specimen shows.

If a cell image spans 40 graticule units at a calibrated scale of 2 µm per unit, its length is 80 µm.

Magnification is not actual size; a drawing should not add structures that are not visible.