The diagram shows a stage micrometer on which the small divisions are 0.1 mm. It is viewed through an eyepiece containing a graticule.
The stage micrometer is replaced by a slide of a plant cell.
What is the length of the nucleus?
1 )
$0.8mm$
2 )
$8\mu m$
$25\mu m$
4 )
$200\mu m$
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