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IB Biology HL B4.2.13 Competitive Exclusion Questions

Explore squirrel and other distribution evidence to evaluate how overlapping niches, resource competition and competitive exclusion produce coexistence, replacement or…

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain competitive exclusion as one species outcompeting another when similar niches overlap and the same limiting resources prevent indefinite coexistence.
  • Interpret squirrel, tit or other distribution data to evaluate niche overlap, replacement, coexistence or exclusion outcomes.

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Study B4.2.13—Competitive exclusion conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL B4.2.13 Competitive Exclusion Questions question 1

[Maximum number: 2]

(a) (i) List two factors that affect the distribution of animal species.

Outline the principle of competitive exclusion.

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