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

Food chains and food webs model feeding relationships in communities. A chain shows one pathway, while a web connects multiple feeding pathways. Arrows point in the direction that energy and biomass transfer between organisms. In IB Biology HL C4.2.4, exam questions ask you to compare these models, construct or interpret them from organisms, and evaluate what food webs represent or leave out.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Compare food chains and food webs as models of feeding relationships: a chain shows one pathway, while a web connects multiple feeding pathways.
  • Construct or interpret food-chain and food-web models from organisms, using arrows to show feeding links and the direction of energy transfer.
  • Evaluate food webs as models of ecological communities by describing what they represent and a limitation, such as complexity or omitted information.

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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