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IB Biology SL 4.2.3 Energy flow through food chains Question Bank

Practise IB Biology SL 4.2.3 by explaining how energy enters and moves through food chains.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how energy enters ecosystems through producers.
  • Describe how energy is transferred and lost along a food chain.

C4.2.3—Chemical energy flow question 1

[Maximum number: 3]

The mass of an individual organism can affect its physiology and feeding ecology. The diagram shows the relative mass of carbon (black) and total wet mass (grey) of a marine crustacean, Calanus hyperboreus and a jellyfish, Bathocyroe fosteri.

Figure for Question C4.2.3—Chemical energy flow question 1 — IB Biology SL

Explain how energy enters, flows through and is lost from marine food chains.

Figure for Question C4.2.3—Chemical energy flow question 1 — IB Biology SL
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