HomeIB ESSTopic 3.1

Biodiversity and evolution

Topic 3.1 defines biodiversity at the genetic, species, and ecosystem levels and explains why it matters for ecosystem stability and human well-being. Students learn about biodiversity hotspots, the relationship between biodiversity and ecosystem services, and methods for measuring species diversity.

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IB ESS · Topic 3.1

Sub-topics in Topic 3.1

3.1.1Biodiversity and its three levels3.1.2Diversity and resilience3.1.3Biodiversity arises from evolution3.1.4Natural selection drives evolution3.1.5How natural selection works3.1.6Speciation3.1.7Richness and evenness3.1.8Measuring biodiversity3.1.9Protecting Biodiversity