Waec Model Questions Vol1 2024 Biology Question 1

Practice practical question 1 from the 2024 Waec Model Questions Vol1 Biology examination. This question covers Cell Structure, Microscopy, Measurement .

Waec Model Questions Vol1 2024 Biology Practical

Topics: Cell Structure Microscopy Measurement

Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • practical

You are given a prepared slide of an unknown plant leaf epidermal tissue and a compound microscope equipped with a 10× ocular lens and a 40× objective lens.

Question Parts

( a )

Describe the step‑by‑step procedure for preparing a temporary wet mount of the leaf epidermis for observation under the microscope.

( b )

Under the microscope you measure the average length of five guard cells as 12 µm, the average width as 4 µm and, from the literature, you assume the thickness (height) to be 2 µm. Treating a guard cell as a rectangular prism, calculate its approximate surface area. Show all working.

( c )

Identify two possible sources of error that could affect the accuracy of the guard‑cell measurements and suggest one practical way to minimise each error.

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About This Question

This is Waec Model Questions Vol1 2024 Biology Question 1. It is one of the practical questions from the 2024 Waec Model Questions Vol1 Biology examination.

The question covers Cell Structure, Microscopy, Measurement .

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