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IB ESS HL 3.1.1 Biodiversity Levels Questions

Distinguish genetic, species and ecosystem diversity and explain why each matters.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • distinguish genetic, species and habitat diversity and relate abundance to species diversity
  • evaluate conservation importance using endemism, species richness, habitat diversity, ecological services and human threat
  • analyse how coral, mangrove and seagrass habitat diversity can create niches and influence fish diversity

Learn this topic

Study 3.1.1—Biodiversity levels conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 3.1.1 Biodiversity Levels Questions question 1

[Maximum number: 1]
Global biodiversity extinction-risk categories

Figure:Global biodiversity extinction-risk categories

Changes in species extinction risk from 1980 to 2015

Figure:Changes in species extinction risk from 1980 to 2015

the two biodiversity charts shown above are based on records for species diversity. Identify one other factor that may be measured to assess the diversity of life on Earth.

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