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IB Biology HL 4.1.14 Competition Tests Question Bank

Practise IB Biology HL 4.1.14 by interpreting competition experiments, population changes, and niche evidence to test how species interact.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Interpret population data from competition experiments and identify competitive exclusion from changing abundances.
  • Use niche overlap and removal-study evidence to distinguish fundamental from realized niches.

C4.1.14—Tests for interspecific competition question 1

[Maximum number: 3]

Paramecium aurelia and Paramecium caudatum are single cell organisms. They were grown separately and together. The population growth curves are shown.

Figure for Question C4.1.14—Tests for interspecific competition question 1 — IB Biology HL

Explain the results shown in this experiment.

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