A-LevelBiologyCell structure9700/12 · Feb/Mar 2018 · Q11 Mark
The eyepiece lens of a microscope can be fitted with an eyepiece graticule. Which of these statements about eyepiece graticules are correct? 1 They measure the actual length of cells in micrometres. 2 They help biologists to draw cells with correct proportions. 3 They change in size when the objective lens is changed from ×10 to ×40.
A1, 2 and 3
B1 and 3 only
C1 only
D2 only
✓ Correct answer
D: 2 only
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