Use mounting, staining, focusing and calibrated measurements to calculate specimen size, magnification and scale bars.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2025–2026.
(ii) State a function of a mitochondrion in an animal cell. (iii) A microscope image has a magnification of 30 000×. Use the calibrated ruler beneath its scale bar to calculate the actual distance represented by the bar in µm.
Describe how to make a temporary microscope mount of a thin leek epidermis sample.
Outline how to prepare a temporary mount of a thin leek epidermis sample.
The superimposed scales calibrate an eyepiece graticule. A young epidermal cell spans 65 graticule divisions at this magnification. Calculate its actual length in µm.
State how the overall magnification of the microscope is calculated.
A student examines a broad-bean root tip with a light microscope. State the measuring accessory needed to determine a cell’s actual length.
Identify the microscope accessory used as a calibrated scale to measure cell dimensions.
A student prepares to examine a leaf section using a light microscope. Suggest a reason for beginning with a low-power objective.
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