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IB ESS HL 2.1.11 Density Dependent Regulation Questions

Practise IB ESS HL 2.1.11 by analysing density feedback, host–parasite cycles and low-population limits that keep populations near equilibrium.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • define density dependence and diagnose factors whose effects rise with population density
  • analyse how food, mates, predation and pathogens regulate named animal populations
  • model reciprocal host–parasite changes as negative feedback towards dynamic equilibrium
  • evaluate low-density effects on genetic diversity, mate finding, resilience and recovery

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Study 2.1.11—Density-dependent regulation conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 2.1.11 Density Dependent Regulation Questions question 1

[Maximum number: 1]

Define the term density-dependent.

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