M1 is a slide of a stained transverse section through a plant structure made up of leaves wrapped around a central area. Observe the region of the section on M1 indicated by the shaded area in Fig. 2.1. - Draw a large plan diagram of this region. Use a sharp pencil. - Include four vascular bundles in your drawing. - Use one ruled label line and label to identify one vascular bundle. (ii) Observe the cells in the lower epidermis of the region indicated by the shaded area in Fig. 2.1. Select a line of four adjacent cells. Each cell must touch at least one of the other cells. - Make a large drawing of this line of four cells. - Use one ruled label line and label to identify a cell wall. Fig. 2.2 is a photomicrograph of a stained transverse section of a stem from a different plant.

Biology

IGCSE&ALevel

CAIE

Exam No：9700_s24_qp_34 Year：2024 Question No：2(a)

Answer:

Knowledge points:

1.1.1 Candidates should be able to:make temporary preparations of cellular material suitable for viewing with a light microscope

1.1.2 Candidates should be able to:draw cells from microscope slides and photomicrographs

1.1.3 Candidates should be able to:calculate magnifications of images and actual sizes of specimens from drawings, photomicrographs and electron micrographs (scanning and transmission)

1.1.4 Candidates should be able to: use an eyepiece graticule and stage micrometer scale to make measurements and use the appropriate units, millimetre (mm), micrometre (µm) and nanometre (nm)

1.1.5 Candidates should be able to: define resolution and magnification and explain the differences between these terms, with reference to light microscopy and electron microscopy

Answer:

Knowledge points:

Solution:

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