Fig. 2.2 is a photomicrograph of a stained transverse section through part of the stem of a different plant species. You are not expected to be familiar with this specimen.
A student calibrated the eyepiece graticule in a light microscope using a stage micrometer scale so that the actual width of the stem could be found.
The calibration was one eyepiece graticule division equal to 29.5 μm.
Fig. 2.2 shows a photomicrograph taken using the same microscope with the same lenses asthe student.
Use the calibration of the eyepiece graticule division and Fig. 2.2 to calculate the actual width of the stem, shown by line X–Y.
Show all the steps in your working and use appropriate units.
actual width of the stem = [3] (2) Fig. 2.2 is a photomicrograph of starch grains inside plant root cells.