IB ESS 3.1.3 Biodiversity from evolution

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise explaining how heritable change, isolation and environmental pressures alter genetic diversity and produce new species over time.

How this is tested

link continental separation or new habitats to isolation and allopatric speciation
describe how mutation, selection or human impacts change genetic diversity over time

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