HomeIB ESSTopic 3.2

Human impact on biodiversity

Topic 3.2 covers the mechanisms of evolution through natural selection, genetic variation, and speciation. Students study how populations change over time, the role of geographic isolation, and how new species form — connecting biological theory to conservation.

Study Topic 3.2: Human impact on biodiversityRead the complete notes with diagrams, key terms, and exam tips
IB ESS Question BankPractise exam-style questions for Topic 3.2IB Command TermsLearn what examiners expect for Explain, Evaluate, Discuss…

IB ESS · Topic 3.2

Sub-topics in Topic 3.2

3.2.1Threats to biodiversity3.2.2Multiple human impacts3.2.3Invasive alien species3.2.4The IUCN Red List3.2.5Why conservation status matters3.2.6Three named species3.2.7The tragedy of the commons