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IB Biology HL C4.2.4 Food Chains and Food Webs Questions

Compare linear chains with networked webs, draw correct feeding arrows and evaluate how food-web models represent ecological communities in IB Biology HL C4.2.4.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Compare food chains and food webs as models of feeding relationships, including linear versus multiple pathways and organisms occupying more than one trophic level in a web.
  • Construct, label or interpret food-chain and food-web diagrams with named organisms and arrows showing the direction of feeding, energy or biomass transfer.
  • Evaluate food webs as ecological models by weighing their realistic summary of possible chains against complexity and omitted quantitative, abiotic or decomposer information.

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Study C4.2.4—Food chains and food webs conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL C4.2.4 Food Chains and Food Webs Questions question 1

[Maximum number: 2]

A retreating glacier leaves an environment of lifeless glacial deposits, including sands and gravels. Retreating glaciers often offer suitable sites for primary succession.

Figure for Question IB Biology HL C4.2.4 Food Chains and Food Webs Questions question 1 — IB Biology HL

Compare and contrast food chains and food webs.

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