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Learning objective

Define a decomposer as an organism that derives its energy from dead or decaying organic matter.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE BiologyOrganisms and their environmentCore content

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Quick explanation

Define a decomposer as an organism that derives its energy from dead or decaying organic matter

  • This point belongs to Food chains and food webs, especially Food chains and food webs outcomes.
  • You need to be able to define a decomposer as an organism that derives its energy from dead or decaying organic matter.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Describe

Why it matters

This objective helps connect Food chains and food webs outcomes to exam-style questions, flashcards, and revision notes for Food chains and food webs.

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Paper 3 structured question: Food chains and food webs

Paper 3Theory (Core)1 marks

Description

Role of Decomposers

Decomposers obtain energy by feeding on dead or decaying organic matter, helping recycle nutrients in the environment.

  1. a

    Describe what a decomposer is.

    Aim for approximately 1 distinct marking point.

    [1]
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