Cambridge IGCSE Biology practice

Paper 3 structured question: Sense organs

Try the question first, then check the answer and practise the same topic again.

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Paper

Marks

Topic

Sense organs

Exam-style question

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Paper 3Theory (Core)3 marks

Diagram of the human eye showing labelled parts.

Diagram Description

A labelled diagram shows the cornea, iris, pupil, lens, retina, optic nerve, and blind spot.

a
Identify the part of the eye that controls the size of the pupil.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
State the function of the retina.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)2 marks

Description

The blind spot is the area on the retina where the optic nerve leaves the eye and contains no light-sensitive cells.

a
Identify the part of the eye where the blind spot is located.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
State why the blind spot does not detect images.
Your answer
Aim for approximately 1 distinct marking point.
[1]