Cambridge IGCSE Biology practice

Paper 3 structured question: Energy flow

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

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Paper

Marks

Topic

Energy flow

Exam-style question

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Paper 3Theory (Core)1 marks

Energy transfer and loss in ecosystems

Description

Energy flows from sunlight to plants, then to herbivores and carnivores, with some energy lost at each stage as heat.

a
Identify one way energy is lost from living organisms to the environment.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Diagram Description

The diagram shows energy moving from sunlight to plants, then to herbivores, then to carnivores, and finally energy lost to the environment.

a
Describe how energy moves through living organisms starting from sunlight.
Your answer
Aim for approximately 2 distinct marking points.
[2]