L1 is a slide of a stained transverse section through a plant root. （b）Fig． 2.1 is a photomicrograph of a stained transverse section through a different plant． Fig． 2.1 Identify three observable differences，other than colour，between the section on L1 and the section in Fig．2．1． Record these three observable differences in Table 2．1． Table 2.1

Biology

IGCSE&ALevel

CAIE

Exam No：9700_w24_qp_34 Year：2024 Question No：2(b)

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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