BI-941
Measuring length
Biology · Secondary 3 · Medium · Measuring length
A student observes a cheek cell under a light microscope using a total magnification of ×400. The image of the cell on the slide is 0.8 mm long. What is the actual length of the cell?
- 0.002 mm
- 0.02 mm
- 0.2 mm
- 2.0 mm
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