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Cambridge IGCSE Biology practice

Paper 3 structured question: Size of specimens

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Size of specimens

Exam-style question

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Paper 3Theory (Core)2 marks

A student observes a leaf under a microscope. The image of the leaf on the screen measures 80 mm in length. The magnification used is 20.

Description

Leaf Observation

The image length of the leaf is 80 mm, and the magnification is 20.

  1. a

    Calculate the actual length of the leaf in millimetres.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Size of specimens

Paper 3Theory (Core)2 marks

Diagram Description

Cell Image

The image of the cell is 50 mm wide, and the actual cell size is 5 mm.

  1. a

    Calculate the magnification of the cell image.

    Aim for approximately 2 distinct marking points.

    [2]