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Cambridge IGCSE Biology practice

What is the main source of energy for biological systems?

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Show answerEnergy flow revisionRevise the key idea

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MCQ

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cambridge_mcq

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Topic

Energy flow

Exam-style question

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What is the main source of energy for biological systems?.

  1. A.The Sun
  2. B.The Moon
  3. C.Earth's core
  4. D.Wind

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Paper 3 structured question: Energy flow

Paper 3Theory (Core)1 marks

Description

The Sun as an energy source

The Sun provides energy that supports life on Earth. Plants use this energy to make food, which then supports animals and other organisms.

  1. a

    State the main source of energy for biological systems.

    Aim for approximately 1 distinct marking point.

    [1]