CourseCourseConceptConceptDocsDocuments

IB Biology HL D4.2.4 Mesocosm Model Questions

Evaluate controlled mesocosm experiments against natural ecosystems and interpret closed-system variable changes.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Evaluate mesocosm advantages and limitations against natural studies, including control of variables, replication and environmental realism.
  • Interpret closed terrestrial mesocosm designs by identifying which carbon, temperature and biomass variables can change.

Learn this topic

Study D4.2.4—Mesocosm model conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D4.2.4 Mesocosm Model Questions question 1

[Maximum number: 2]

An investigation into food web interactions was conducted in mesocosms in the Mediterranean Sea, off the coast of France. The effects of the addition of soil and fish on bacterial populations were tested.

Figure for Question IB Biology HL D4.2.4 Mesocosm Model Questions question 1 — IB Biology HL
Figure for Question IB Biology HL D4.2.4 Mesocosm Model Questions question 1 — IB Biology HL

Suggest advantages of undertaking this experiment in the sea rather than in the laboratory.

All question bank results loaded